Track-Mounted Wheel Restraint with Motorized Carrier
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Solution Overview
Problem
Existing wheel restraint systems for loading docks lack efficient and safe mechanisms to prevent vehicles from accidentally departing during cargo transfer, as they often rely on manual or permanent solutions that may not effectively secure vehicles in all scenarios.
Innovation Solution
A retractable wheel-blocking barrier system mounted on a carrier that travels along a track, with a barrier catch and carrier catch mechanism to securely position and release the barrier, ensuring the wheel is trapped between the barrier and the platform, and utilizing sensors and signal indicators for enhanced safety and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a manual wheel chock is used to restrain the vehicle, then the device complexity is reduced, but the reliability of preventing accidental departure is insufficient
Solution Approach 1:
The wheel restraint system automatically engages with the vehicle wheel when the vehicle backs onto the dock, eliminating the need for manual intervention. The carrier automatically positions the barrier against the wheel, and the system self-latches into place, providing reliable restraint without requiring operator action.
Solution Approach 2:
The patent replaces simple manual mechanical chocks with an automated mechanical system that uses a motorized carrier to position and deploy the barrier. This substitution of manual operation with automated mechanical control enhances reliability while managing complexity through integration.
2Ease of operation
If a permanently mounted hook restraint is used to engage the ICC bar, then the ease of operation is improved, but the adaptability to different vehicle types is reduced
Solution Approach 1:
The wheel restraint system is designed to dynamically adapt to different vehicle types by positioning the barrier directly against the actual wheel contact point. The carrier can adjust its position along the track to accommodate different wheel locations, and the barrier conforms to the wheel's position, providing universal compatibility across various vehicle configurations.
Solution Approach 2:
The system changes its operational parameters by adjusting the carrier position and barrier placement based on the specific vehicle wheel location. This allows the same device to effectively restrain different vehicle types by modifying its physical configuration rather than requiring different restraint mechanisms for each vehicle type.
3Reliability
If a wheel-blocking barrier is mounted to the driveway, then the reliability of wheel obstruction is improved, but the ease of repositioning and release is worsened
Solution Approach 1:
The barrier is mounted on a motorized carrier that can dynamically move along the track to reposition the barrier as needed. The system can be easily released by reversing the carrier motor, which automatically retracts the barrier from the wheel path. This dynamic positioning capability provides both reliable obstruction when engaged and easy release when needed.
Solution Approach 2:
The patent replaces manual release mechanisms with an automated motorized carrier system. The carrier uses a motor to move the barrier into and out of the wheel path, eliminating the need for manual manipulation of mechanical release latches or levers. This substitution makes the release process as easy as activating a motor reversal command.
4Reliability
If sensors and indicators are added to provide visual signals for operational status, then the safety is improved, but the device complexity is increased
Solution Approach 1:
The system incorporates sensors that detect the presence of the vehicle wheel and the engagement status of the barrier. Visual indicators provide feedback to operators about the system's operational state, such as whether the barrier is properly positioned or if the vehicle is correctly aligned. This feedback loop enhances safety by preventing improper operation while maintaining relatively simple system architecture.
Data Source
AI summary
Example manual wheel restraint systems and methods for restraining a vehicle at a loading dock include are disclosed herein. An example wheel restraint disclosed herein includes a retractable wheel-blocking barrier mounted to a carrier that can be repositioned along a track, where the track is anchored to a driveway of a loading dock. The track runs generally parallel to a vehicle path that a wheel of a vehicle travels along as the vehicle backs into the dock. To block a rear wheel of the vehicle parked at the dock, the barrier extends laterally into the wheel path, adjacent or in front of the wheel. To release the vehicle, the barrier retracts out from within the wheel path. In some examples, to ensure that the vehicle is secured, the barrier and/or the carrier include barrier or carrier catches to help hold the barrier and carrier in a fixed position. In some examples, one or more sensors determine or sense whether the catches are secured or released and generate signals accordingly. The signals, in some examples, alert dock personnel of the condition of the catches.