Threshold Adapter Profile for Barrier-Free Sliding Sash Guidance
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Solution Overview
Problem
Existing ground threshold systems for sliding sashes and doors face challenges in providing a barrier-free transition, effective drainage, and maintaining tightness against driving rain, especially in old building thresholds, where guide webs protrude and create tripping hazards and allow water ingress.
Innovation Solution
A threshold system incorporating an adapter profile with a trapezoidal cross-section that adapts to the threshold profile, featuring a sloping side surface for drainage and a widening profile that conceals the transition, ensuring a flush and level surface while directing water away from sensitive materials, and using a snap-in connection for secure sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guide webs are integrated into old building thresholds, then roller guidance is achieved, but the threshold height increases creating tripping hazards and barrier-free transition problems
Solution Approach 1:
The guide web is nested within a recess in the threshold, allowing the roller to engage with the guide web while the overall threshold height remains low. The guide web protrudes into the recess rather than extending above the threshold surface, eliminating tripping hazards while maintaining functional guidance.
Solution Approach 2:
The guide web is positioned locally within a specific recess area of the threshold, concentrating the guidance function in a localized zone rather than requiring the entire threshold to be elevated. This allows barrier-free transition in most areas while providing necessary guidance where needed.
2Reliability
If sealing systems are installed to prevent water ingress, then tightness against driving rain is improved, but water pressure from wind forces water through seals into the interior
Solution Approach 1:
The drainage channel extracts and removes water from the threshold area, providing an escape route for water that prevents water accumulation and reduces water pressure against the sealing system. This extraction mechanism works in conjunction with the seals to comprehensively prevent water ingress.
Solution Approach 2:
The threshold system combines multiple materials and functions: sealing elements for tightness, drainage channels for water removal, and hydrophobic coatings on the upper side to repel water. This composite approach addresses both sealing and drainage needs simultaneously.
3Ease of operation
If threshold systems are designed with guide bars and rollers, then sliding sash operation is enabled, but the transition area forms steps and tripping hazards
Solution Approach 1:
The guide bar is nested within a recess in the threshold, allowing the roller to engage with the guide bar while the threshold surface remains flush. The guide bar extends into the recess rather than protruding above the threshold, maintaining a smooth transition surface.
4Ease of operation
If adapter profiles are added to achieve barrier-free transitions, then tripping hazards are eliminated, but device complexity increases
Solution Approach 1:
The guide web, drainage channel, and threshold structure are merged into a single integrated component. The guide web and drainage channel are formed as part of the threshold itself rather than as separate additions, simplifying the overall device while achieving barrier-free transition.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
Floor sill system (9) for a displaceable sash as a sliding sash (3) or displaceable lift-and-slide sash of a window or of a door (1), comprising a receiving groove (10) in a floor sill profile (11) for receiving a guide web (12) for a running rail (15) which has the running rollers (13) of sash-side running carriages (14) and which is arranged opposite the sliding sash (3) on the upper side of the floor sill profile (11), wherein the guide web (12) can be engaged over its entire length into the receiving groove (10) with a form or force fit. There is preferably provided an adapter profile (16) which, by way of a connecting means (18) equipped convexly on its underside (17), can engage into the receiving groove (10) in the floor sill profile (11) with a form and/or force fit, and has on its upper side (19) a receiving groove (20) which is formed congruently to the receiving groove (10) in the floor sill profile (11), wherein the receiving groove (20) of the adapter profile (16) receives the guide web (12) on its upper side and, together with the upper side (19), forms a surface-flush, barrier-free contact. Furthermore, a visible bearing and lateral surface (21, 22) is formed on the respective sides of the adapter profile (16) and against which there can be laid, to the inner side (23) of the room, an inner floor surface (24) and, to the outer side (25) of the room, selectively different expansion profiles (26, 27) for transition to the outer floor surface (28), preferably for barrier-free transitions. The lateral surface (22) of the adapter profile (16) is arranged offset, at least in the passage region to the outer side (25) of the room of the sliding sash (3) of the window or of the door (1) on the upper side (19), with respect to the vertical plane of the sash frame (5) of the sliding sash (3) in the direction of the receiving groove (20) and distances itself in the direction of the lower side (17) of the adapter profile (16) and of the floor sill profile (11) with a leg (46) having an acute angle to the outer side (25) of the room, starting from the sliding sash (3), wherein a gap (42) is formed on the outer side (25) of the room between the sash frame (5) and the lateral surface (22) and into which a horizontal web (43) of the expansion profile (26) is inserted and covers the gap (42) in a virtually gap-free manner while maintaining a drainage joint (44). The web (43) and the adapter profile (16) are positioned in an overlapping manner by the sash frame (5) of the sliding sash (3).