Sectional Door Entrance Lock Composite Shaft Segmentation
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Solution Overview
Problem
Existing sectional door entrance systems lack secure and stable closure mechanisms, as they rely on vertical hinges and locks that fail to effectively retain all panels, leading to instability and reduced security, especially during the curved trajectory displacement of the sectional door.
Innovation Solution
A closure system for the entrance door featuring a composite shaft formed by interconnected vertical shaft segments that operate under a single lock, ensuring all panels are securely blocked without hindering the door's curved trajectory, with each panel equipped with a bolt and pawl mechanism for enhanced stability and ease of operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single lock blocks only one panel of the entrance door, then the lock mechanism is simple, but the closure effectiveness is reduced and security is compromised
Solution Approach 1:
The shaft is divided into multiple segments (first shaft segment, second shaft segment, third shaft segment) corresponding to different panels of the entrance door. Each segment can rotate independently to operate block means on different panels, allowing a single lock to control multiple panels through segmented shaft rotation.
Solution Approach 2:
Multiple block means (first block means, second block means, third block means) are merged into a single integrated system operated by one lock through the segmented shaft. The lock simultaneously or sequentially engages all panels by rotating the shaft segments, combining multiple blocking functions into one operation.
2Reliability
If vertical shaft segments are connected to block means on each panel, then all panels can be securely blocked, but the shaft may hinder the curved trajectory movement of the sectional door
Solution Approach 1:
The shaft is segmented into multiple independent sections (first shaft segment, second shaft segment, third shaft segment) that can rotate relative to each other. This segmentation allows the shaft to accommodate the curved trajectory movement of the sectional door while maintaining the blocking function on each panel through independent segment rotation.
Solution Approach 2:
The shaft segments are designed to be dynamically adjustable, allowing them to rotate and adapt to the curved trajectory movement of the sectional door. The block means can engage and disengage as needed during door movement, providing dynamic retention rather than rigid fixed positioning.
Data Source
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AI summary
A sectional door (S) with a cut out entrance door (P), the entrance door being formed by a number of superimposed panels (P) mutually hinged, wherein each entrance door panel (P) is hinged to a corresponding section of the sectional door (S), and wherein a first entrance door panel (P1) is provided with a lock (L) intended to block the entrance door (P) with respect to the sectional door (S), wherein the lock (L) is operatively connected with vertical shaft segments (6) suitable for being displaced between an opening position and a closing position, which shaft segments (6) end at their end portions in correspondence of the hinge axes of the first panel (P1), and for the other panels of the entrance door (P) there are provided vertical shaft segments (6) coaxial with said shaft segments (6) of the first panel (P1) and connected to means (B) for blocking with respect to the sectional door (S), the shaft segments (6) of all the panels (P) forming a composite shaft (6) interrupted in correspondence with the hinges among the panels (P), through which shaft the lock is able to operate the blocking means (B) of all the entrance door panels. This composite shaft (6), being interrupted in correspondence of the hinges among the panels (P), does not hinder the displacements of the panels, that are needed for following the curved trajectory of the sectional door (S).