Twistlock Locking Mechanism Using Gravity-Based Sliding Lock
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing twistlock mechanisms are complex and expensive to manufacture, prone to mechanical failure due to spring-based locking systems, which can lead to operational failures and safety risks, such as containers falling during transportation.
Innovation Solution
A gravity-based lock mechanism that secures the twistlock in place by using a sliding locking means along a guide rail, allowing for reliable locking in both upright and inverted positions, preventing detachment due to vibrations or twisting forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If spring-based locking means are used in twistlocks, then the locking mechanism can return to locking position automatically, but the mechanism becomes complex and expensive to manufacture
Solution Approach 1:
The patent removes the spring component from the locking mechanism entirely. Instead of using spring-based locking means that automatically return to locking position, the invention employs a gravity-based system where the locking means simply drops into the locking position under gravity when released, eliminating the need for complex spring mechanisms while maintaining automatic return functionality
Solution Approach 2:
The locking means utilizes gravity as a natural force to return to the locking position without requiring additional energy sources or complex mechanisms. The system serves itself by leveraging the inherent gravitational force acting on the locking means, eliminating the need for springs or other active components
2Ease of operation
If lever-acting or cable-acting locking means are used, then the twistlock can be operated manually, but the structure becomes complex and expensive
Solution Approach 1:
The patent eliminates levers, cables, and associated linkage mechanisms. The locking means is directly connected to the operating mechanism through a simple guide rail, removing the complex transmission components while maintaining manual operability. The locking means moves linearly along the guide rail and rotates into position, achieving manual operation with minimal structural complexity
Solution Approach 2:
Instead of using a lever or cable to transmit force through complex linkage, the invention inverts the approach by having the locking means move directly along a guide rail and rotate into position. The operating mechanism directly controls the locking means without intermediate transmission components, simplifying the overall structure
3Reliability
If complex locking means are used, then the locking mechanism can secure the twistlock, but manufacturing costs increase
Solution Approach 1:
The locking mechanism is divided into simple, discrete components: a locking means with basic locking features and a separate guide rail structure. This segmentation allows each component to be manufactured independently using simple processes, reducing overall manufacturing cost while maintaining securing capability
Solution Approach 2:
The locking means is designed as a simple, inexpensive component without complex spring mechanisms or precision linkage. The simplified design reduces material costs and manufacturing complexity, making the overall system more cost-effective while maintaining adequate securing capability for container fastening
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 provides an inexpensive, reliable, and simplified twistlock mechanism that ensures secure fastening of containers in various orientations, reducing the risk of operational failures and enhancing safety during transportation.
Implementation Method 1
The operation of which lock mechanism is based on a locking means functioning by gravity
Data Source
Figure 1~4
Figure 5~8
AI summary
Lock mechanism of a twistlock (1) or of some other such fitting for fastening a twistlock or other fitting to a counterpart (5), such as to a corner casting (5) of a container or to a container foundation fixed to a hatch cover of a ship, which twistlock (1) or other fitting comprises a body (2). The invention is implemented in such a way that the lock mechanism comprises a locking part (3), which can be moved in relation to the body (2) between a locking position, in which twisting of the twistlock (1) or other fitting in the counterpart (5) is prevented, and an open position, in which twisting of the twistlock (1) or other fitting in the counterpart (5) is possible.