Trailer Side Door Sliding Hinged Panel Interlock
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Solution Overview
Problem
Conventional transport vans with side doors face difficulties in loading goods from the rear due to the complexity of their closing mechanisms, which often result in leaves not being perfectly contiguous when closed, creating gaps and rough surfaces.
Innovation Solution
The design features sliding panels and hinged leaves that interlock with complementary shapes and elastic engagement mechanisms, ensuring a smooth, continuous surface when closed, with minimal gaps and no play, allowing for easy loading and secure sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If leaves are hinged successively to each other in opposite directions to allow folding accordion or boustrophedon, then the door is easier to maneuver and access, but the leaves are not perfectly contiguous when closed, creating gaps and rough surfaces
Solution Approach 1:
The door is divided into multiple leaves that can fold independently, with each leaf being manageable in size. This segmentation allows the complex folding motion to be broken down into simpler individual leaf movements, improving maneuverability while maintaining contiguity through proper hinge design.
Solution Approach 2:
A intermediate hinge mechanism is introduced between adjacent leaves that includes positioning elements and guiding structures. This intermediary component ensures that during the folding operation, the leaves remain aligned and contiguous, preventing gaps while still allowing the accordion folding motion.
2Ease of operation
If sliding closing panels with hinged leaves are used to close side faces, then the van is easier to access from the side, but loading from the rear becomes difficult due to the complexity of the structure
Solution Approach 1:
The door system is designed with dynamic characteristics, allowing it to transition between different configurations. The leaves can fold laterally for side access, and the entire door assembly can be opened fully for rear loading. This dynamic adaptability allows the same structure to serve multiple loading purposes efficiently.
Solution Approach 2:
The door system provides more opening capability than the minimum required for side access. By allowing the leaves to fold completely lateral and the panels to open fully, the system exceeds the basic side access requirement, thereby enabling efficient rear loading operations as well.
3Reliability
If strong hinge means are used to support the entire mass of the chain of leaves, then the door structure is more reliable, but the device complexity increases
Solution Approach 1:
The hinge system is segmented into multiple independent hinge joints, one for each leaf connection. Each hinge supports only the local weight and forces of adjacent leaves rather than the entire chain mass. This segmentation reduces the complexity of each individual hinge while maintaining overall structural reliability through distributed support.
Solution Approach 2:
The hinge mechanism incorporates dynamic elements such as rollers, pivots, and flexible connections that allow smooth relative motion between leaves. These dynamic components reduce friction and wear, enabling reliable operation with simpler hinge designs that do not require excessive strength to handle the entire leaf chain mass statically.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables seamless loading from the rear and maintains a continuous, sealed surface inside the van, enhancing operational efficiency and accessibility while ensuring secure closure.
Implementation Method 1
the or each panel and each hinged leaf comprises, according to their thickness, for one a curvilinear groove and for the other a tongue of their own complementary shape to ensure docking of the two boards by pivoting around their outer common edges and by interlocking of the tongue and groove, and the two boards further comprise elastic engagement means of the two boards to ensure their locking
Data Source
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AI summary
The truck (10) has a covered rear body (12) with an opening side (30) for loading/unloading made up of a combination of sliding (50) and hinged (52) panels. The sliding panels move in guide rails (42, 44) along the bottom and top of the opening side, and each sliding panel has a hinged panel on each side. The hinged panels open outwards, and once they are open the sliding panels can be moved along to one or both ends of the body opening, freeing a space for loading/unloading. When the hinged panels are closed and fastened they present a smooth and continuous surface on the inside of the vehicle body.