Double-Wing Door Automatic Seal with Perpendicular Secondary Surface
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Solution Overview
Problem
Existing automatic door seals, particularly on double-leaf doors, face challenges in securing a tight seal at the ends where the sealing profiles are cut surfaces, leading to potential water penetration due to capillary forces and vertical cracks, especially on the lock side where only the ends of the sealing profiles are available for sealing.
Innovation Solution
The introduction of a second sealing surface, attached to a second holding part, which is arranged perpendicularly to the first sealing surface, allowing it to bear against a mating surface optimized for sealing, and a mechanism to move this surface into position to create a continuous seal with the first sealing surface when the door is closed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single sealing surface is used at the end of the sealing profile, then the structure is simple and easy to manufacture, but the sealing reliability is insufficient due to small contact area and cut surfaces
Solution Approach 1:
The sealing strip is divided into multiple segments: a first sealing part with a first sealing surface for contacting the door frame, and a second sealing part with a second sealing surface for contacting the mating surface. This segmentation allows each sealing surface to be optimized for its specific sealing function, with the first sealing surface handling the main sealing and the second sealing surface providing additional sealing at the end of the profile where cut surfaces would otherwise create leakage paths.
2Manufacturing precision
If the sealing profile is trimmed to desired length, then the fit to the door frame is improved, but the cut surfaces create sealing gaps and reduce sealing performance
Solution Approach 1:
The solution adds a second sealing surface oriented perpendicular or at an angle to the first sealing surface. This dimensional change creates a multi-directional sealing approach where the second sealing surface contacts the mating surface (door frame end or adjacent sealing element) to seal the gap created by trimming, while the first sealing surface maintains the primary sealing contact along the door frame.
3Reliability
If only the ends of sealing profiles are used for sealing on the lock side, then the device complexity is minimized, but the sealing reliability is insufficient due to vertical cracks and gaps
Solution Approach 1:
The second sealing part is specifically positioned at the end of the sealing profile where the lock side sealing is critical. This localized enhancement provides additional sealing capability precisely where vertical cracks and gaps are most problematic, without requiring complete redesign of the entire sealing system. The second sealing surface is optimized for contacting the mating surface at this critical location.
Data Source
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AI summary
The invention relates to an automatic seal (D) for a single- or multi-leaf, in particular double-leaf, door with a mullion, wherein the seal can be mounted at a lower or upper end of a door leaf of the door and wherein the seal (D) • has a first fastening part (1) that can be fastened to the door leaf, • has a sealing strip (6, 7, 8, 9) movable relative to the first fastening part (1) between a release position and a sealing position, which comprises a first retaining part (6) and a first sealing part (8) that has a first sealing surface which, in the sealing position of the sealing strip (6, 7, 8, 9), bears in a sealing position against a first counter surface and, in the release position of the sealing strip (6, 7, 8, 9), has a gap from the first counter surface, • with a first mechanism (5) for moving the sealing strip (6, 7, 8, 9), which is connected on one side to the first fastening part (1) and on the other side to the sealing strip (6, 7, 8, 9). 7, 8,9) is connected, • with a drive coupled to the first mechanism (5) by means of which a force can be introduced into the first mechanism (5) so that the sealing strip (6, 7, 8, 9) is moved from the release position to the sealing position, • the sealing strip (6, 7, 8, 9) has a second retaining part (7) attached to the first retaining part (6), • the sealing strip (6, 7, 8, 9) has a second sealing part (9) with a second sealing surface, which is attached at least to the second retaining part (7), and • the second sealing surface is arranged perpendicular or nearly perpendicular to the first sealing surface.