Knitting Yarn Holding Device with Pressing Member
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Solution Overview
Problem
In flatbed knitting machines, the existing yarn holding devices struggle to securely hold multiple strings or slippery yarns, leading to potential yarn dropouts, especially when primary and finer yarns are used simultaneously or when multiple yarns are fed from the same feeder port.
Innovation Solution
A knitting yarn holding device with a hook bar system that includes a pressing member with a depressing part and a spacer, which gathers and presses the yarn at the latching stop part from a direction intersecting with the hook bar's pull-in direction, ensuring secure holding by clipping the yarn between the hook's side surfaces and the supporting accept part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hook bar holds the knitting yarn only by clipping it between the latching stop part and the supporting accept part, then the structure remains simple, but the yarn holding reliability is insufficient for multiple or slippery yarns
Solution Approach 1:
The holding device is segmented into multiple functional components: the hook bar with latching stop part, the supporting accept part, and the pressing member with depressing part. Each component performs a specific function in the yarn holding process, allowing the system to handle multiple yarn types reliably while maintaining reasonable structural complexity through modular design.
Solution Approach 2:
The pressing member introduces a new dimension of control by applying force from a direction intersecting with the pull-in direction of the hook bar. This multi-directional approach (clipping + pressing) enhances yarn holding reliability for slippery or multiple yarns without significantly complicating the overall device structure.
2Quantity of substance
If the hook bar is pulled in to hold the yarn between the latching stop part and supporting accept part, then the holding action is simple, but multiple yarns cannot be sufficiently gathered and held
Solution Approach 1:
The pressing member with depressing part performs a preliminary gathering action on the yarns before the final holding action. By pressing the yarns toward the latching stop part from a direction intersecting with the pull-in direction, it ensures all yarns (including multiple strings from the same feeder port) are properly positioned and gathered, enabling reliable holding of multiple yarns.
3Reliability
If the yarn is held only by the hook bar clipping action, then the operation is straightforward, but slippery yarns may disengage and drop out
Solution Approach 1:
The solution adds a pressing action from a direction intersecting with the pull-in direction of the hook bar. This creates a multi-dimensional holding mechanism where the yarn is both clipped by the hook bar and pressed by the pressing member, providing redundant retention that prevents slippery yarns from disengaging and dropping out.
Data Source
Figure 1(a)~1(f)
Figure 2
Figure 3
AI summary
[Problem to be Solved] To provide a knitting yarn holding device for a flatbed knitting machine that can hold a knitting yarn securely and with care to prevent it from dropping out. [Solution] A knitting yarn holding device 1, captures a knitting yarn 4 fed from a yarn feeder port 3 at an edge of a needle bed by moving a hook 5a forward and backward relative to a needle bed gap 2, and can clip and hold the knitting yarn 4, between side surfaces of a latching stop part 5b and of a supporting accept part 7a on the needle bed side, when the hook 5a is pulled in from the needle bed gap 2. To a cam groove 5c, a follower part 6c in the vicinity of a depressing part 6b installed at the head end of an elastic leg 6a being extended from a spacer 6 installed as a upper retainer of a hook bar 5 is fitted in, and the elastic leg 6a energizes the follower part 6c in the direction coming into contact with a cam face 5d. Pressing plates 7 are mounted on both sides of the spacer 6. On the needle bed gap 2 side of the pressing plate 7, a supporting accept part 7a is formed, which presses the hook 5a by pressing parts 7b from both sides of the portion holding the knitting yarn 4 to prevent the hook 5a from opening, and thereby holds the knitting yarn securely.