Trellis Post Wire Retention via Segmented Transverse Beads
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing trellis posts with wire holders struggle to securely retain tension wires during strong movements, such as those caused by harvesting machines, leading to potential wire escape and requiring excessive maintenance.
Innovation Solution
The trellis post design incorporates a second transverse bead on the leg with a larger bead width than the wire holder, allowing secure attachment on both sides and accommodating a range of oblique removal angles, combined with a resilient hook and curved bead base for enhanced wire retention and ease of insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transverse bead with smaller bead width than the wire holder is used, then the wire lock prevents unintentional removal of the tension wire, but the tension wire can escape during strong movements caused by harvesting machines
Solution Approach 1:
The wire retention system is segmented into two distinct transverse beads: a first transverse bead with smaller bead width for wire lock functionality, and a second transverse bead with larger bead width for movement accommodation. This segmentation allows each bead to specialize in one function, resolving the contradiction between preventing unintentional removal and accommodating strong movements.
Solution Approach 2:
Different regions of the trellis post structure are given different properties: the first transverse bead has smaller bead width (tighter constraint) while the second transverse bead has larger bead width (looser constraint). This local differentiation in geometric properties enables the system to simultaneously achieve both wire security and movement tolerance.
2Ease of operation
If the hook is made resilient to increase clearance for easier wire insertion, then wire insertion becomes easier, but wire security may be compromised
Solution Approach 1:
The resilient hook is designed to automatically increase clearance during the wire insertion process, creating preliminary favorable conditions for easy insertion. After insertion, the hook returns to its original position, maintaining wire security. This preliminary action resolves the contradiction by providing ease of operation only when needed during insertion.
Solution Approach 2:
The hook transitions from a static structure to a dynamic, resilient element that can change its geometry in response to applied forces. This dynamic behavior allows the hook to adapt between two states: high clearance for easy insertion and low clearance for secure retention, resolving the contradiction between ease of operation and wire security.
3Reliability
If a second transverse bead with larger bead width is added, then the wire holder can accommodate oblique removal angles and absorb large movements, but the device complexity increases
Solution Approach 1:
The second transverse bead with larger bead width serves multiple functions simultaneously: it acts as a mechanical stop to define maximum oblique removal angles, provides additional space to absorb large movements from harvesting machines, and works in conjunction with the first transverse bead to create the wire lock mechanism. This multi-functionality justifies the added structural element.
Solution Approach 2:
The two transverse beads are deliberately made asymmetric in their bead width dimensions. The first transverse bead has smaller width for tight wire lock, while the second has larger width for movement accommodation and angle definition. This asymmetric design allows each bead to fulfill its specific function optimally while together they provide comprehensive wire retention.
Data Source
AI summary
A trellis post for viticulture or fruit growing is shown, with a hollow profile (2), in particular an open one, which has at least one leg (4, 5), wherein this leg (4, 5) has an open and recessed longitudinal rib (6) extending in the longitudinal direction (7) of the hollow profile (2) with at least one hook (8) projecting from its rib base (9), which forms a wire receptacle (11) for a tension wire (12) together with the rib base (9), and wherein this leg (4, 5), which is divided into two leg sides (13, 14) by the longitudinal rib (6), has on its first leg side (13) a first open and recessed transverse rib (15) extending in the transverse direction (10) of the hollow profile (2), which adjoins the longitudinal rib (6) and is arranged at the hook (8).wherein this first transverse groove (15) with its smaller groove width (17) compared to the receiving length (16) of the wire receptacle (11) for wire securing (18) due to the tension wire (12) being taken obliquely from the wire receptacle (11) from a minimum angle (19).