Sliding Door Locking Rail to Prevent Sash Lift-Out
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Solution Overview
Problem
Existing sliding door arrangements are vulnerable to burglary due to the risk of the guide element being removed during a break-in attempt, allowing the sash to be pried open, and existing anti-lift devices require additional components or complicate installation.
Innovation Solution
A locking mechanism with overlapping locking bolts is integrated into the sliding door assembly, where the bolts overlap when the sash is closed, preventing lateral movement and enhancing burglary resistance without increasing the door's mounting complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If guide elements are mounted on the sash end face for guiding the sash along the guide rail, then the sash can be smoothly operated, but the guide elements can be removed during break-in attempts allowing the sash to be pried open
Solution Approach 1:
The locking function is segmented from the guide element and implemented through separate locking bolts that engage with the guide rail. The first locking bolt is arranged in the guide rail while the second locking bolt is arranged on the sash, creating independent locking segments that prevent sash removal even if guide elements are compromised.
Solution Approach 2:
The locking bolts are positioned to engage with the guide rail before the sash can be pried open. The first locking bolt in the guide rail and the second locking bolt on the sash create a preliminary mechanical interlock that prevents the harmful action of prying the sash open, countering potential burglary attempts before they can succeed.
2Reliability
If additional anti-lift devices are added to prevent sash removal, then burglary resistance increases, but device complexity and installation difficulty increase
Solution Approach 1:
The locking mechanism merges the anti-lift function with the existing guide rail structure. The first locking bolt integrates directly into the guide rail, combining the guiding and locking functions into a single structural element, thereby preventing sash removal without requiring separate anti-lift devices.
Solution Approach 2:
The guide rail serves multiple functions: it guides the sash movement and simultaneously houses the first locking bolt for anti-lift protection. The locking mechanism is designed to be universally applicable to different sash widths and configurations, providing burglary resistance through a multi-functional component rather than specialized anti-lift devices.
3Reliability
If locking bolts are positioned to overlap and engage when sash is closed, then burglary resistance increases, but the locking mechanism complexity increases
Solution Approach 1:
Instead of using a complex multi-component locking system, the invention inverts the approach by using simple bolt elements that engage through overlapping positioning. The first locking bolt in the guide rail and the second locking bolt on the sash overlap when closed, creating an effective lock through their relative positioning rather than through complex interlocking mechanisms.
Solution Approach 2:
The locking mechanism uses simple, inexpensive bolt elements rather than complex mechanical locks. The first locking bolt and second locking bolt are basic fastening elements that provide effective burglary resistance through their overlapping engagement, avoiding the need for expensive, complex locking mechanisms with multiple moving parts.
Data Source
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AI summary
The invention relates to a sliding door arrangement (10) comprising a frame (12), a leaf (16) movable along a displacement direction (14) relative to the frame (12) between an open position and a closed position, and a further leaf element (18) arranged fixedly or slidably in the frame (12), wherein the leaf (16) is arranged on the frame (12) in front of the leaf element (18), wherein a guide rail (44) is attached to an upper frame cross member (22), and at least one guide element (48) is attached to an upper leaf cross member (32), extending towards the guide rail (44), wherein a locking device (50) is provided with a first locking part (52) and a second locking part (54), wherein the first locking part (52) is arranged and attached in the guide rail (44), and the second locking part (54) is arranged and attached to the upper leaf cross member (32), wherein the locking parts (52,54) are designed and/or arranged relative to each other such that the locking parts (52, 54) overlap each other when the sash (16) is closed, with the first locking part (52) engaging behind the second locking part (54) on its side facing away from the sash element (18).