Rotating Barrier Vehicle Restraint for RIG Adaptation
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Solution Overview
Problem
Existing vehicle restraints at loading docks face challenges in effectively restraining trucks due to variations in the supporting structure of the Rear Impact Guard (RIG), which can interfere with the operation and provide inadequate holding force, leading to potential damage or release of the truck.
Innovation Solution
A vehicle restraint system with a movable barrier that rotates and translates to capture and secure the RIG, utilizing a combination of springs, actuators, and stop members to adjust blocking positions and provide varying levels of resistance, ensuring secure engagement and safe release of the truck.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-position restraint mechanism is used, then the structure is simple, but it cannot accommodate variations in RIG supporting structures and provides inadequate holding force
Solution Approach 1:
The restraint mechanism employs a movable barrier that can rotate and translate between different positions (blocking, preparatory, and intermediate blocking positions) rather than being fixed. This dynamic capability allows the barrier to adapt to various RIG supporting structures while maintaining effective restraint, resolving the contradiction between adaptability and structural simplicity.
Solution Approach 2:
The barrier is divided into functional segments with different blocking positions (upper blocking position for standard RIGs, lower preparatory position for descent, and intermediate blocking position for varying structures). This segmentation allows the single barrier to handle multiple RIG configurations without requiring multiple specialized restraints.
2Force
If the barrier uses a single blocking position, then the mechanism is simple, but it cannot provide varying levels of resistance for different RIG structures
Solution Approach 1:
The barrier transitions between multiple blocking positions (upper and lower) to provide varying levels of holding force. The actuator controls these position changes dynamically, allowing the system to apply appropriate force levels for different RIG structures without adding complex mechanical force multiplication mechanisms.
Solution Approach 2:
The actuator serves as an intermediary device that controls the barrier's movement between blocking positions. This intermediary mechanism provides a simple yet effective way to adjust holding force levels without requiring complex mechanical linkages or multiple spring systems.
3Reliability
If the barrier remains in the blocking position, then the truck is securely restrained, but the truck cannot be released for the next vehicle
Solution Approach 1:
The barrier dynamically transitions between the blocking position (for secure restraint) and the preparatory position (for release). The actuator controls this movement, allowing the system to maintain reliability during restraint while enabling easy release by simply moving the barrier to the preparatory position, eliminating the need for complex release mechanisms.
4Ease of operation
If the barrier descends below the RIG bar, then the restraint is released, but the supporting structure may interfere with operation
Solution Approach 1:
The barrier performs preliminary action by moving to the intermediate blocking position before fully descending to the preparatory position. This intermediate position allows the barrier to clear the RIG bar while minimizing interference with the supporting structure, enabling smooth release operation without the harmful interference that would occur with direct descent.
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 system effectively restrains trucks by adjusting blocking positions and resistance levels, accommodating different RIG structures and preventing accidental movement or damage, while allowing safe release for subsequent vehicles.
Implementation Method 1
a spring positioned to push the barrier toward the blocking position
Implementation Method 2
an actuator positioned to move the barrier from the preparatory position to the blocking position
Data Source
AI summary
Example vehicle restraints with rotating and translating barriers are disclosed herein. An example vehicle restraint disclosed herein a main body installable at a loading dock and a barrier to be coupled to the main body. The barrier rotates about an axis relative to the main body between an upper blocking position to block the RIG and a stored position to release the RIG, where for a given elevation of the main body the barrier being higher in the upper blocking position than in the stored position. The barrier moves radially with respect to the axis.