Anchor Point Eyelet Stops to Prevent Kinking Under Transverse Load
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Solution Overview
Problem
Existing anchor points for lifting and lashing objects often experience kinking issues due to unfavorable angular positions of the connecting eyelet relative to the eyelet bend, leading to potential jamming and reduced transverse load capacity.
Innovation Solution
The anchor point incorporates projecting movement limiting stops both inside and outside the connecting eyelet, with the maximum diameter of the section carrying these stops larger than the eyelet arch, ensuring only line contact and preventing stable two-point support, allowing unhindered hinge movement and easy release under tensile force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the connecting eyelet is allowed to hinge freely in the eyelet arc, then the alignment freedom is improved, but the risk of kinking and jamming increases due to unfavorable angular positions
Solution Approach 1:
The patent applies preliminary anti-action by providing movement-limiting stops (both internal and external) that prevent the connecting eyelet from reaching unfavorable angular positions before kinking can occur. These stops create a predetermined mechanical constraint that counteracts the potential harmful motion, ensuring the eyelet remains within a safe angular range during operation.
Solution Approach 2:
The patent changes the geometric parameters of the connecting eyelet by providing two different radius arcs (first arc with larger radius, second arc with smaller radius) and positioning movement-limiting stops at specific locations. This parameter variation allows the eyelet to hinge freely within a controlled range while preventing excessive angular displacement that would cause kinking.
2Reliability
If movement limiting stops are added to prevent kinking, then reliability is improved, but device complexity increases due to additional components
Solution Approach 1:
The patent merges multiple functions into the connecting eyelet itself: it serves as both the hinging component and the structure that carries the movement-limiting stops. The internal and external stops are integrated features of the eyelet, eliminating the need for separate limiting mechanisms and reducing overall device complexity while maintaining reliability.
Solution Approach 2:
The connecting eyelet is designed with multi-functionality, serving simultaneously as the rotating connection element, the structure carrying limiting stops, and the component that defines its own movement boundaries through the combination of two radius arcs and integrated stops. This universal design reduces the need for additional specialized components.
3Adaptability or versatility
If the connecting eyelet can align freely in any direction, then adaptability is improved, but the transverse load capacity decreases due to potential unfavorable positioning
Solution Approach 1:
The movement-limiting stops provide preliminary anti-action by preventing the connecting eyelet from positioning itself in unfavorable angular orientations that would compromise transverse load capacity. The stops ensure the eyelet remains within an optimal angular range where it can withstand transverse forces effectively.
Solution Approach 2:
By changing the geometric parameters through the two-radius arc design and positioning stops at specific locations, the patent creates an optimal balance between alignment adaptability and transverse load capacity. The eyelet can adapt to various loading directions within the permitted angular range while maintaining sufficient strength through the constrained geometry.
Data Source
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Figure 3
AI summary
The invention relates to an attachment point for securing on an object to be secured and/or handled, comprising a connection means (4, 5) for connecting the attachment point (1) to an object to be secured and/or handled, having an eyelet arc (6) connected to a main body (7) and a connection eyelet (8), mounted in the eyelet arc (6), for connecting an attachment or lashing means, which connection eyelet (8) has a smaller radius in its arc (10) mounted in the eyelet arc (6) than in its other arc (9) and which connection eyelet (8) carries two dividing elements (13, 13.1) that are located opposite one another with regard to their longitudinal axis and project into the interior I enclosed by the connection eyelet (8). A particular characteristic is that the connection eyelet (8) carries a movement limiting stop (15), projecting with regard to the central fibre M of said connection eyelet (8) and located opposite the dividing elements (13, 13.1) in each case on the outside, for limiting the introduction depth of the connection eyelet (8) into the eyelet arc (6) together with the internally projecting dividing elements (13, 13.1), which are likewise configured as movement limiting stops (14), as a result of which movement limiting stops (14, 15) the maximum diameter of that portion of the connection eyelet (8) that carries the movement limiting stops (14, 15) is greater than the clear width of the eyelet arc (6), wherein the contour forming the movement limiting stops (14, 15) is shaped in order that there is substantially only linear contact between the movement limiting stops (14, 15) and the eyelet arc (6) in the attachment arrangement.