Hookloader Latch Control by Boom Inclination
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Solution Overview
Problem
Hookloaders often experience latch unlocking at inconvenient or dangerous times due to manual control or gravity, leading to safety and operational issues during container handling.
Innovation Solution
A method and apparatus for automatically controlling the latch of a hookloader using inclination sensors and actuators, allowing the latch to lock or unlock based on the boom arm's inclination, eliminating the need for manual intervention and ensuring secure container attachment and detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual control or gravity is used to open and close the hook latch, then the operation is simple and requires no additional actuators, but the latch unlocks at inconvenient or dangerous times leading to safety issues
Solution Approach 1:
The patent employs feedback control by using an inclination sensor to continuously monitor the boom arm angle and automatically actuate the latch mechanism based on detected inclination thresholds. This closed-loop feedback system ensures the latch remains locked during safe inclination ranges and automatically unlocks when the boom arm reaches predetermined angles, eliminating manual intervention while maintaining operational reliability.
Solution Approach 2:
The latch mechanism is designed to be self-actuating through a spring-return actuator that automatically responds to inclination changes. The system serves itself by using the boom arm's own motion and gravitational force, combined with sensor feedback, to trigger latch locking and unlocking without requiring external manual control or complex additional actuators.
2Reliability
If automatic latch control based on inclination sensing is implemented, then safety and reliability are improved by preventing accidental unhooking, but the device complexity increases due to additional sensors and actuators
Solution Approach 1:
The patent replaces complex mechanical control systems with a sensor-based electronic control approach. Instead of using intricate mechanical linkages and switches to detect boom arm inclination, the system uses electronic inclination sensors that provide precise angular measurement and trigger automatic latch actuation through an electronic control circuit, simplifying the overall system architecture while improving reliability.
Solution Approach 2:
The system monitors the inclination parameter of the boom arm and uses predetermined threshold values to automatically control latch state transitions. By changing the control parameter from manual operation to automated inclination-based triggering, the system achieves improved safety without requiring complex decision-making logic, simply comparing sensor output against preset thresholds to determine latch actuation.
3Productivity
If the latch is controlled to unlock automatically at specific inclinations, then operational efficiency is improved by eliminating manual intervention, but the risk of unlocking at dangerous times increases if control is not precise
Solution Approach 1:
The system is configured with predetermined inclination thresholds that are set in advance to ensure unlocking occurs only at safe and appropriate moments in the operating cycle. By pre-programming the critical inclination angles at which latch unlocking should occur, the system ensures that container release happens only when the boom arm is in a safe position, eliminating the risk of premature or dangerous unlocking while maintaining automated efficiency.
Solution Approach 2:
The inclination sensor provides continuous feedback on the boom arm position, allowing the control system to make real-time decisions about latch actuation. This feedback mechanism ensures that unlocking occurs precisely at the intended inclination thresholds and prevents accidental release during dangerous phases of operation, maintaining both productivity and safety through accurate timing control.
Data Source
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AI summary
There is disclosed a method of operating a hookloader, the hookloader comprising a chassis for receiving a container, and a boom arm pivotably moveable with respect to the chassis, with a linear actuator disposed therebetween and actuatable to pivot the boom arm. The boom arm comprises a hook having a hook body defining an opening for hooking the container, the hook comprising a latch configured to lock to close the opening of the hook, or to unlock to open the opening of the hook. The method comprises receiving an inclination parameter relating to the inclination of the boom arm and controlling the latch of the hook to lock or unlock based on the inclination parameter.