Elastic Retaining Device for Flexible Screen Ejection Prevention
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Solution Overview
Problem
Flexible doors with vertical opening face issues with stiffeners or semi-rigid transverse bars detaching from guides under excessive external forces, such as wind pressure or collisions, leading to potential ejection and damage.
Innovation Solution
An elastic retaining device with anchoring elements that move vertically inside profiles and flexible, elastic links housed in sheaths, allowing the curtain to deform without ejection from guides and return to its original shape after the anomaly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stiffeners or semi-rigid transverse bars are used to maintain the flexible curtain, then the curtain can be directed and held in the obstructed area, but the stiffeners may detach from guides under excessive external forces such as wind pressure or collisions
Solution Approach 1:
The patent changes the physical state of the retaining elements from rigid (stiffeners) to elastic (elastic elements). This parameter change allows the elements to deform under excessive force while maintaining connection, preventing detachment while still providing retention functionality during normal operation
Solution Approach 2:
The elastic elements are pre-configured to absorb and dissipate excessive external forces through elastic deformation before these forces can cause detachment or damage. This beforehand cushioning protects the system by converting harmful kinetic energy into elastic potential energy temporarily
2Shape
If stiffeners or semi-rigid transverse bars are used, then the curtain maintains its shape and position, but the system lacks flexibility to absorb anomalies without ejection
Solution Approach 1:
The patent transitions from static rigid stiffeners to dynamic elastic elements that can adapt their configuration based on operating conditions. During normal operation, the elastic elements maintain the curtain shape; during anomalies, they deform to absorb energy, providing both shape maintenance and anomaly response capabilities
Solution Approach 2:
The elastic elements change their physical parameters (shape, length) in response to external forces, allowing the system to adapt between maintaining rigid structure during normal operation and becoming flexible during anomalies
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
Maintains the curtain's movement path between open and closed positions while preventing ejection during anomalies and ensuring a return to the original shape, enhancing protection and functionality.
Implementation Method 1
to ensure that the canvas or the flexible curtain is deformed without risk of ejection or unhinging of said canvas or of said flexible curtain from the guides integral with the side uprights of the handling door and a return to its initial shape after the anomaly has disappeared
Data Source
Figure 1
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AI summary
Retaining device with elastic deformation for a flexible screen of a vertically-opening goods handling door. The vertically-opening goods handling door according to the present invention comprises an elastic retaining device (10) which consists of retaining means (11) allowing, firstly, the flexible screen or curtain (12) to be held on course during its movement between an open position and a closed position and, secondly, in the event of an anomaly, allowing the flexible screen or curtain (12) some elastic deformation without the risk of said flexible screen or curtain (12) being expelled or dislocated from the lateral uprights (13, 14) and ensuring that it reverts to its initial form when the anomaly disappears.