Gravity-Pivoting Climbing Lock for Wind Turbine Ladders
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing climbing lock systems for fixed ladders, particularly in wind turbine towers, fail to effectively secure open ends during assembly, posing a safety risk as workers may unintentionally disengage their safety harnesses.
Innovation Solution
A climbing lock system with a pivotably attached climbing lock unit that automatically locks into place due to gravity, allowing downward movement of a fall arrester but preventing upward movement until deliberately unlocked, and a deactivation unit that ensures the lock remains engaged until the assembly is complete.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a climbing lock unit is provided at the open end of a ladder segment to prevent accidental disengagement of safety harnesses, then worker safety is improved, but the device complexity and assembly time increase due to the need for additional locking components and their activation/deactivation during assembly
Solution Approach 1:
The climbing lock unit is designed with a pivotable pawl that automatically engages with the ladder segment due to gravity, locking the fall arrester in place without requiring external activation. The pawl's center of gravity is positioned to ensure it naturally assumes the locked position, eliminating the need for manual intervention during normal operation and reducing assembly complexity.
Solution Approach 2:
The climbing lock unit is pre-assembled and attached to the ladder segment during manufacturing or pre-assembly phases. The deactivation unit is pre-positioned to hold the pawl in the open position during assembly, allowing workers to safely connect ladder segments before the locking function is activated. This preliminary preparation ensures safety mechanisms are in place before workers need them.
2Ease of operation
If a climbing lock unit with automatic locking due to gravity is used, then the ease of operation is improved as workers do not need to manually activate locks, but the device complexity increases due to the pivotable mechanism and gravity-dependent design
Solution Approach 1:
The pivotable pawl is designed with its center of gravity positioned to create a natural locking moment. The gravitational force acting on the pawl's mass automatically engages the locking position, eliminating the need for springs, motors, or other active components. This gravity-based mechanism simplifies the overall system while maintaining automatic locking functionality.
3Productivity
If deactivation units are provided to hold climbing locks in the open position during assembly, then assembly efficiency is improved by allowing barrier-free passage, but the reliability decreases as the system becomes more susceptible to unintended activation or deactivation
Solution Approach 1:
The deactivation unit acts as a temporary intermediary mechanism that holds the pawl in the open position during assembly operations. It is designed to be easily removed or deactivated once assembly is complete, at which point the climbing lock unit automatically assumes its locked position. This intermediary component enables efficient assembly without compromising the reliability of the final locked state.
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 the safety of workers by preventing accidental disengagement of safety harnesses during assembly and allows secure connection of ladder segments only after the climbing locks are reactivated, enhancing safety and assembly efficiency.
Implementation Method 1
The climbing lock unit (10) is pivotably attached to the ladder segment (20) and falls into the locked position without external action and due to gravity
Data Source
Figure 1
Figure 2A~3C
Figure 4A~4C
AI summary
The invention relates to a climbing locking system for vertical ladders, in particular of a wind turbine. The climbing locking system has at least one vertical ladder segment (20) having a longitudinal direction and at least one open end (20a, 20b) for accommodating a catching device, which can be moved back and forth in the longitudinal direction as a climbing protection system. The climbing locking system also has at least one climbing locking unit (10) at the at least one open end (20a, 20b) of the vertical ladder segment (20). The climbing locking unit (10) is pivotably fastened to the vertical ladder segment (20) and has a locking position for blocking motion of a catching device in a direction of the vertical ladder segment (20) and a passage position for letting motion of the catching device in the longitudinal direction of the vertical ladder segment (20) through in both directions.