Winding Grid Closing Device for Burglary Protection
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Solution Overview
Problem
Existing closing devices for passage openings, such as shutters, are bulky, obstructive, aesthetically unattractive, and costly, making them difficult to install and combine with other fixtures, while also obscuring light and view.
Innovation Solution
A closing device featuring a grid element made of flexible longitudinal cables and transverse elements that can be wound around a core, providing structural rigidity and flexibility for easy installation and adaptation to various dimensions, with locking mechanisms and sliding guides to ensure secure closure without obstructing light or view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional closing devices such as shutters are used, then burglary protection is provided, but the device becomes bulky and difficult to install
Solution Approach 1:
The patent applies this principle by using a grid element composed of flexible longitudinal cables instead of rigid shutter panels. The cables can be wound into a compact coil around a winding core, dramatically reducing the volume occupied when not in use, while still providing effective burglary protection when deployed across the opening.
Solution Approach 2:
The closing device is segmented into multiple independent longitudinal cables rather than using a single solid panel. This segmentation allows each cable to be individually wound and stored, reducing overall bulkiness while maintaining structural integrity and security function when the cables are extended across the opening.
2Reliability
If traditional closing devices are used, then security function is achieved, but light and view are completely obscured
Solution Approach 1:
The grid element functions as a porous structure with spaces between the longitudinal cables, allowing light and visual observation to pass through while still providing effective burglary protection. The porous configuration maintains security functionality without completely obscuring the environment.
3Strength
If traditional closing devices are used, then mechanical resistance is guaranteed, but aesthetic appeal is reduced
Solution Approach 1:
The flexible cable construction provides a modern, sleek aesthetic compared to traditional bulky shutters. The thin, elegant profile of the cables maintains mechanical resistance through proper tensioning and material selection while significantly improving visual appeal and allowing light transmission.
4Stability of the object's composition
If grid element is made with rigid structure, then structural rigidity is provided, but flexibility for winding is reduced
Solution Approach 1:
The patent applies parameter changes by selecting cable properties (diameter, material, tensile strength) that provide sufficient structural rigidity and burglary resistance while maintaining enough flexibility to be wound around a compact core. The parameters are optimized to balance both rigidity and windability.
Solution Approach 2:
The grid element uses composite construction combining longitudinal cables with transverse connecting elements. This composite structure provides enhanced rigidity and structural stability while the cable-based composition maintains flexibility for winding, resolving the contradiction between rigidity and adaptability.
Data Source
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AI summary
A device for closing passage openings such as gate, door, window, French window openings or the like, which device comprises a closing element at least partially constituted by a grid and which device is movable from a closed position of the passage opening to an at least partially or totally closed position of said passage opening, or vice versa. According to the invention, the closing element is made so that at least part of its extent, and preferably its entire extent, can be alternately wound around a winding core and unwound from said winding core, the grid element being constituted by a plurality of flexible, longitudinal cables, parallel and placed side-by-side, which are oriented in a direction basically perpendicular to the winding axis, which cables are connected to each other by a plurality of transverse elements oriented parallel to the winding axis and are retained by them at predetermined distances, while said transverse elements are stably coupled to each longitudinal cable at the point of intersection therewith, the completely wound condition of the grid element on the winding core corresponding to the open condition of the passage opening and the completely unwound condition of the grid element from the winding core to the completely closed condition of the passage opening.