Locking Device for Fire Protection Glazing
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Solution Overview
Problem
Existing fire protection glazing systems face challenges in maintaining mechanical stability and optical clarity while allowing for the use of gel-filled double glazing, as traditional locking mechanisms compromise the integrity of the glass panes and lead to optical distortions and impaired fire protection properties.
Innovation Solution
A locking device comprising a lock case housing, counterplate, and sleeve-like spacer, which is connected via a fixing means through a mineral fire protection plate, allowing for secure attachment to gel-filled double glazing without bending the glass panes and minimizing heat transfer, while maintaining the fire protection and optical integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional locking mechanisms are used with gel-filled double glazing, then the locking function is achieved, but the glass panes bend and gel filling displaces due to pressure
Solution Approach 1:
A mineral fire protection plate is introduced as an intermediary element between the locking mechanism and the glass panes. This plate distributes the mechanical pressure from the locking device across a larger area, preventing localized stress that would cause glass bending and gel displacement. The plate acts as a mediator that transfers forces in a controlled manner.
Solution Approach 2:
The locking device is segmented into distinct functional components: a lock case housing for mounting the locking mechanism, a separate mineral fire protection plate for pressure distribution, and sleeve-like spacers for positioning. This segmentation allows each component to perform its specific function optimally without compromising the glass panes.
2Reliability
If multiple holes are drilled in the glass for fastening the lock, then the locking device can be attached, but the mechanical strength of the glass is significantly weakened
Solution Approach 1:
The mineral fire protection plate is nested within a recess in the glass pane, creating a recessed mounting area. This nesting approach allows the locking device to be attached to the plate rather than directly to the glass, reducing the need for multiple holes in the glass itself and preserving its structural integrity.
3Ease of manufacture
If the lock case housing is directly mounted on the glass, then installation is simplified, but heat transfer from the fire side increases
Solution Approach 1:
The mineral fire protection plate serves as a thermal barrier between the lock case housing and the glass panes. This plate interrupts the direct thermal pathway that would otherwise conduct heat from the fire side to the opposite side, reducing heat transfer while still allowing for secure mounting of the locking mechanism.
4Reliability
If gel-filled double glazing is used, then fire protection properties are improved, but the glazing cannot withstand pressure from traditional locking mechanisms
Solution Approach 1:
The mineral fire protection plate extends beyond the immediate mounting area of the locking device, providing excessive coverage area for pressure distribution. This ensures that even if some areas experience localized stress, the overall pressure is distributed across a sufficient area to prevent glass bending and maintain the integrity of the gel-filled glazing.
Data Source
AI summary
The present invention relates to a closing device (1) for a pivoting and/or tilting fire protection element (2), particularly in the form of a fire protection door or a fire protection window, having a glazing (3) made of at least two parallel offset glass panes, wherein the closing device comprises at least: a lock case housing (7), in which a lock case having an integrated lock is inserted and attached, wherein the lock case housing is provided for mounting on the glazing of the pivoting and/or tilting fire protection element, at least one backing plate for the lock case housing, at least one sleeve-like spacer (15), and at least one mineral fire protection plate (16), wherein the lock case housing is connected to the backing plate by means of at least one fastener passing through the spacer, and the fire protection plate is clamped between the lock case housing and the backing plate such that the lock case housing protrudes past the fire protection plate at at least two opposite sides.