Window Sill End Piece Sealing and Length Compensation
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Solution Overview
Problem
Existing window sill designs fail to achieve sufficient tightness and length compensation relative to building walls, leading to water infiltration and structural instability, especially in applications with temperature fluctuations and varying parapet cover element lengths.
Innovation Solution
A window sill design featuring a sealing element between the parapet cover element and the end piece, with a channel-shaped drainage system and additional support webs, ensures secure sealing and water drainage, while allowing for length adjustments and secure attachment to the building wall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional window sill design is used, then the structure is simple, but water infiltration occurs and tightness is insufficient
Solution Approach 1:
The window sill is divided into multiple functional components: a U-shaped profile part for structural support, a separate molded part for water management, and a sealing profile for waterproofing. This segmentation allows each component to perform its specific function optimally while maintaining overall system reliability.
Solution Approach 2:
A sealing profile acts as an intermediary element between the U-shaped profile part and the molded part, creating a waterproof barrier that prevents water infiltration while allowing the two structural components to remain distinct and functional.
2Adaptability or versatility
If the parapet cover element is made adjustable for length changes, then temperature fluctuation compensation is improved, but the attachment stability deteriorates
Solution Approach 1:
The end piece is designed with a sliding mechanism that allows the parapet cover element to move dynamically within a controlled range, accommodating thermal expansion and contraction while maintaining secure attachment through friction and geometric constraints.
Solution Approach 2:
Different regions of the end piece have different properties: the sliding region allows movement for length adjustment, while the attachment region maintains fixed positioning for stability. This local differentiation enables both adaptability and stability in appropriate locations.
3Object-affected harmful factors
If drainage channels are added to prevent water infiltration, then water management is improved, but the device complexity increases
Solution Approach 1:
The drainage function is merged into the molded part, which is integrated with the U-shaped profile part to form a unified water management system. This combination eliminates the need for separate drainage components while effectively preventing water infiltration.
Solution Approach 2:
The molded part with integrated drainage channels automatically manages water flow through gravity-driven channels, eliminating the need for additional active water management systems or complex mechanical components.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a window sill (5) for covering a parapet comprising a parapet cover element (13), at least one terminating part (17) which is connected to the parapet cover element (13) in the region of a front face (14) and at least one end piece (18), which has a substantially U-shaped profile open towards the parapet cover element (13) and interspaced first and second limbs (22, 23) interconnected by means of a base web (24). The second limb (23) of the end piece (18), said limb lying adjacent to the underside (15) of the parapet cover element (13), overhangs the terminating part (17) in the direction of the longitudinal extension of the parapet cover element (13). A sealing element (33) is situated and extends between the underside (15) of the parapet cover element (13) and a section of the second limb (23) of the end piece (18), said section overhanging the terminating part (17), and the sealing element is connected to both the underside (15) of the parapet cover element (13) and the second limb (23) of the end piece (18). The invention also relates to an end piece (18) and to a method for assembling a window sill (5).