Jacquard Heddle Loop Structure for Bending and Corrosion Resistance
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Solution Overview
Problem
Existing Jacquard heddles are prone to bending out of the longitudinal plane, leading to high stress on connections and premature wear, especially when dealing with thick warp threads, and are not well-suited for corrosive environments.
Innovation Solution
A Jacquard heddle design featuring monofilament wires with circular cross-sections and free openings, allowing pivoting within loops to reduce bending stress, and a link with specific hole dimensions and a polymer-overmolded connectors to minimize snagging and corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the heddle uses traditional twisted thread connections to the link, then the structure is simpler, but the connection is subjected to high stress when the heddle bends out of the longitudinal plane, causing incipient breaks and premature wear
Solution Approach 1:
The patent replaces traditional twisted thread connections with spherical ball joints that connect the heddle wires to the link. These ball joints allow the heddle to bend out of the longitudinal plane without subjecting the connections to high stress, as the spherical geometry enables rotation and movement in multiple directions while maintaining structural integrity. This resolves the contradiction by providing both connection strength and resistance to premature wear under bending conditions.
Solution Approach 2:
The patent changes the connection mechanism from fixed twisted threads to movable ball joints, fundamentally altering the mechanical parameters of the connection. The ball joints provide rotational freedom and stress distribution that twisted threads cannot achieve, allowing the connection to adapt to bending forces while maintaining strength and reliability.
2Stability of the object's composition
If the heddle uses welded wire connections to the link, then the connection is more rigid, but the connection is subjected to significant stress when the heddles are deformed by bending out of the longitudinal plane
Solution Approach 1:
The patent replaces rigid welded wire connections with spherical ball joints that connect the heddle wires to the link. These ball joints allow the heddle to bend out of the longitudinal plane without subjecting the connections to high stress, as the spherical geometry enables rotation and movement in multiple directions while maintaining structural integrity. This resolves the contradiction by providing both connection strength and resistance to premature wear under bending conditions.
Solution Approach 2:
The patent transitions from static welded connections to dynamic ball joint connections that can adapt their orientation and movement in response to bending forces. The ball joints provide rotational freedom and stress distribution that welded connections cannot achieve, allowing the connection to maintain rigidity when needed while accommodating deformation through controlled movement.
3Ease of manufacture
If the heddle uses twisted thread connections, then the manufacturing is simpler, but the twists are not protected from corrosive environments, promoting incipient breaks
Solution Approach 1:
The patent employs ball joints that can be manufactured from corrosion-resistant materials such as stainless steel or treated metals, replacing the traditional twisted thread connections. The ball joint structure allows for protective coatings and material selections that provide inherent corrosion resistance, while maintaining the mechanical functionality of the connection. This resolves the contradiction by providing both ease of manufacture through standardized components and protection against corrosive environments.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A Jacquard heddle (6) comprising a link (8) with an upper hole (83) and a lower hole (85) of circular cross-section. A first monofilament yarn (65A) enters the upper hole, forming an upper loop (67A), and a second monofilament yarn (65B) enters the lower hole, forming a lower loop (67B). The Jacquard heddle (6) includes an upper end connector (60A) to which two end portions (69A) of the first yarn (65A) are attached, and a lower end connector (60B) to which two end portions (69B) of the second yarn (65B) are attached. The upper loop (67A) defines a free opening (671A) extending from the upper hole to the point where the two end portions of the first yarn are joined to the upper end connector.The lower loop delimits a free opening (671B) extending from the lower hole to the connection of the two end portions of the second wire with the lower end connector.