Dock Leveler Weather Shield for Telescopic Lip Sealing
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Solution Overview
Problem
Current seal systems for dock levelers with telescopic lips fail to provide an effective and consistent environmental barrier, as they must accommodate the lip's linear movement and unique structural features, such as slits, while avoiding interference with the lip's operation and being easily installable and customizable.
Innovation Solution
A flexible curtain-style shield system that can be custom-cut and adapted to fit various dock levelers, with an upper edge attached to the telescopic lip and a lower edge anchored to a convenient location, along with side panels to seal the pit area, ensuring effective sealing regardless of the lip's position and movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional seal system is used for dock levelers with telescopic lips, then the seal must accommodate the lip's linear movement and structural features like slits, but this creates interference with the lip's operation and installation complexity
Solution Approach 1:
The shield system is designed to be dynamic rather than static, with the upper edge attached to the telescopic lip itself. As the lip extends or retracts linearly, the shield automatically adjusts its position through the attachment mechanism, maintaining an effective seal without requiring complex active control systems. The shield's lower edge is anchored to the dock structure while the upper edge moves with the lip, creating a dynamic sealing barrier that adapts to the lip's position.
Solution Approach 2:
The shield system is divided into distinct segments: an upper edge portion that attaches to the telescopic lip, a lower edge portion that anchors to the dock structure, and side panels that seal the pit area. This segmentation allows each portion to perform its specific function independently while working together as a cohesive sealing system, simplifying installation and maintenance.
2Reliability
If the shield is designed to move with the telescopic lip, then sealing effectiveness is improved, but the shield may interfere with the lip's linear movement and operation
Solution Approach 1:
The attachment mechanism between the shield's upper edge and the telescopic lip acts as an intermediary element. This intermediary connection allows the shield to move with the lip while accommodating the lip's linear movement through a designed attachment interface that prevents interference. The intermediary mechanism ensures the shield remains properly positioned relative to the lip without restricting its operational range or movement smoothness.
3Device complexity
If a fixed or pivotally-mounted lip seal is used, then the seal structure is simpler, but it cannot effectively shield the pit area when the lip is in extended position with slits open to outdoor air
Solution Approach 1:
The shield system addresses the slit infiltration problem by extending the sealing barrier into a third dimension. Instead of relying solely on the lip's horizontal sealing surface, the shield creates a vertical barrier that extends downward from the lip to the pit area. This dimensional extension ensures that even when slits are open to outdoor air, the shield blocks air infiltration through the pit area, providing comprehensive sealing coverage.
Data Source
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AI summary
A dock leveler with a vertically adjustable deck and horizontally translating lip (22) includes a weather shield that helps shelter a pit area underneath the lip and the deck (20). The dock leveler and shield system is particularly suited for serving trucks that include a rear liftgate. An upper edge of the weather shield seals against and moves with the lip of the dock leveler, and a lower edge of the shield can be attached to a lower dividing panel. The lower dividing panel (sometimes known as an ISO panel) isolates the deck of the dock leveler from a liftgate-receiving receptacle within the pit area. The weather shield accommodates the lip's horizontal movement and the decks vertical movement. The shield is such that it further accommodates a vertically moving door panel that can close in front of both the deck and the lip.