Telescopic Mast Safety Device with Elastic Trigger
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Solution Overview
Problem
Existing lifting devices with telescopic masts for heavy loads, such as composite wood panels or vapor barrier rolls, face complexity and high costs due to intricate safety mechanisms, and struggle with dimensional deviations in tubular frames, leading to potential safety failures.
Innovation Solution
A telescopic mast with an integrated safety device featuring a profiled metal safety member with longitudinally extending teeth, pivotally mounted and activated by an elastic return member, which automatically transitions from a neutral to a safety position upon traction element failure, blocking column telescoping without requiring additional cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional safety devices with additional cables and complex attachment mechanisms are used, then safety function is provided, but device complexity and manufacturing cost increase
Solution Approach 1:
The invention extracts and eliminates the additional safety cable and its complex attachment device from the system. Instead, it integrates the safety function directly into the existing traction cable assembly through a simple rupture-sensitive trigger mechanism that activates the locking teeth when the cable breaks, thereby providing safety without adding complexity.
Solution Approach 2:
The invention merges the safety function with the existing traction cable structure. The safety member with locking teeth is integrated into the column assembly, and the trigger mechanism is coupled with the traction cable routing, combining multiple functions (traction and safety) into a unified system rather than separate components.
2Manufacturing precision
If fixed dimensional specifications for tubular frame are used, then manufacturing precision is improved, but adaptability to dimensional deviations decreases
Solution Approach 1:
The invention introduces dynamic adjustability through the movable safety member that can be positioned at different heights along the column. The locking teeth can engage with the tubular frame at various positions, allowing the system to adapt to dimensional variations in the frame while maintaining precise locking functionality at the engaged position.
Solution Approach 2:
The invention changes the positional parameter of the safety member along the column height to accommodate dimensional deviations in the tubular frame. By making the safety member height-adjustable, the system can compensate for variations in frame dimensions while maintaining the precision of the locking mechanism at the selected position.
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
This solution simplifies the safety system, reduces manufacturing and implementation costs, and adapts to dimensional variations, ensuring reliable safety without additional cables, effectively preventing telescopic mast collapse in case of traction element rupture.
Implementation Method 1
unbalanced action of the elastic member which is capable of pivoting the safety member into a safety position
Implementation Method 2
The safety member is capable of being held by a tensile force of the traction element
Implementation Method 3
at least one of the teeth is able to be anchored, in the safety position, in the thickness of the inner wall of the tubular frame to block column telescoping
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The telescopic mast (1) includes a safety device (7) fixed to a traction element (6) and pivotally mounted about an axis (8), said safety device (7) being capable of being held by the traction element (6) in a neutral position, and of being pivoted, in the event of breakage of the traction element (6), by the return of an elastic element (9) to a safety position, said safety device (7) comprising at least two teeth (11) extending longitudinally along different lengths and of which at least one of the teeth (11) is capable of anchoring, in the safety position, in the thickness of the inner wall of the tubular frame (5). According to the invention, the safety device (7) is a profiled metal part comprising two parallel wings (7d) extending longitudinally, the teeth (11) being provided at one end of said wings (7d).