Thread Guide with Offset Eyelets for Flat Knitting Machines
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Solution Overview
Problem
Existing thread guides for flat knitting machines often result in thread interference when multiple threads are fed simultaneously, leading to uneven tension and errors in knitted fabrics due to their symmetrical structure and lack of effective separation mechanisms.
Innovation Solution
A thread guide with offset thread guide eyelets on both sides of the central axis, both transversely and longitudinally, and at different heights, along with additional guiding elements and shields, ensures separate and fanned-out thread feeding to prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple threads are passed through the same two thread guide eyelets simultaneously, then thread feeding capacity is improved, but thread interference occurs leading to uneven tension and fabric errors
Solution Approach 1:
The patent divides the thread guide system into multiple independent thread guide elements, each with its own eyelets. Instead of passing multiple threads through the same two eyelets, each thread is routed through a separate thread guide element, eliminating thread interference while maintaining high feeding capacity
Solution Approach 2:
The patent introduces spatial separation by arranging thread guide elements at different positions and orientations. Thread guide eyelets are offset from one another in multiple dimensions, creating distinct three-dimensional thread paths that prevent interference while allowing simultaneous feeding of multiple threads
2Device complexity
If thread guide eyelets are arranged symmetrically on the thread guide arm, then structural simplicity is improved, but thread separation is insufficient causing interference
Solution Approach 1:
The patent employs asymmetric arrangement of thread guide eyelets on each thread guide element. The eyelets are positioned at different locations and orientations rather than symmetrically, which enables effective thread separation and fanning out while maintaining overall structural efficiency
3Reliability
If additional independent thread guide elements are added to increase thread separation, then thread interference is reduced, but device complexity increases significantly
Solution Approach 1:
The patent integrates multiple thread guide elements into a single unified thread guide assembly that is collectively mounted on the thread guide arm. This merging approach allows effective thread separation through multiple elements while avoiding the complexity of completely independent drive systems for each element
Data Source
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AI summary
The guide (1) has thread guidance nuts (40) arranged at a top part of a thread guidance arm (30). Thread guidance eyelets (60, 61, 70, 71) supply threads to the thread guidance nuts. The thread guidance eyelets are arranged on both sides of a central axis (M) of the guide perpendicular and transverse to a thread guidance arm-longitudinal direction. The thread guidance eyelets are arranged on or in thread guidance members (50) that are arranged at the thread guidance arm and provided with lateral arms (51, 52). The thread guidance eyelets are arranged on the lateral arms.