Conveyor Trapdoor Assembly with Inadvertent Opening Prevention
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Solution Overview
Problem
Conveyor assemblies for vehicles lack a secure mechanism to prevent accidental opening of the trapdoor assembly, which is essential for safe operation and efficient vehicle movement, especially when a human is near the edge of the track.
Innovation Solution
A trapdoor assembly with a device configured to prevent inadvertent opening, utilizing a biasing device and proximity sensors to ensure the trapdoor only opens when the dolly is present and applying a sufficient force, and automatically returns to the closed position when not in use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the trapdoor assembly is made easily movable to allow the dolly to translate around the edge, then the ease of operation is improved, but the reliability deteriorates due to risk of inadvertent opening by humans
Solution Approach 1:
The trapdoor assembly includes a device configured to prevent inadvertent opening before the dolly arrives. The trapdoor is biased toward the closed position and requires a specific activation mechanism (such as a latch release or force application) to open, ensuring it is ready to be opened only when the dolly is present and properly positioned to trigger the opening mechanism.
Solution Approach 2:
An intermediary mechanism (such as a latch, cam, or actuator) is introduced between the trapdoor and the opening force. This intermediary ensures that the trapdoor can only be opened when the proper signal or force is applied by the dolly, preventing direct or accidental opening by humans while still allowing smooth operation when needed.
2Reliability
If the trapdoor assembly is secured to prevent inadvertent opening, then the reliability is improved, but the ease of operation worsens due to additional security mechanisms
Solution Approach 1:
The trapdoor assembly is designed to be self-actuating through the dolly's presence or action. The dolly itself triggers the opening mechanism (e.g., by applying force to a release point, moving a cam, or activating a sensor), eliminating the need for separate manual operation while maintaining reliability through the inherent security of the biased closed position.
Solution Approach 2:
The trapdoor assembly changes its operational parameters (such as the force required to open or the position of locking elements) based on the presence of the dolly. When the dolly is absent, the trapdoor remains securely closed with high resistance to opening; when the dolly is present, the parameters change to allow easy opening through the dolly's action.
3Reliability
If a device is added to prevent inadvertent opening, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The device to prevent inadvertent opening is merged with the existing trapdoor assembly structure. The security mechanism is integrated into the trapdoor's moving components, latch system, or actuation mechanism rather than being a separate add-on, thereby improving reliability while minimizing the increase in overall device complexity.
Solution Approach 2:
The trapdoor assembly's existing components are designed to serve multiple functions: the biased closed position mechanism provides both the closing force and the security against inadvertent opening; the actuation mechanism serves both to open the trapdoor for dolly passage and to demonstrate the secure closed position when inactive. This multi-functionality reduces the need for additional dedicated security components.
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
Ensures safe and efficient operation by preventing accidental trapdoor openings, allowing the dolly to move seamlessly around the edge of the track while preventing human-induced errors, thus maintaining conveyor system functionality.
Implementation Method 1
utilizing a biasing device and proximity sensors to ensure the trapdoor only opens when the dolly is present and applying a sufficient force
Data Source
AI summary
A conveyor assembly is provided for movably supporting a tire of a vehicle. The conveyor assembly includes a track, a dolly, and a trapdoor assembly. The track is configured for supporting the tire of the vehicle. The track terminates at an edge, and a gap is defined beyond the edge. The dolly is configured to move along the track to the edge so as to guide the tire along the track to the edge. The trapdoor assembly is configured to substantially cover the gap when in a closed position and is movable to an open position to uncover the gap and allow the dolly to translate around the edge. The trapdoor assembly includes a device configured to prevent a human from inadvertently opening the trapdoor assembly.