Connection Member Yarn Capture Guide Surface Claw
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Solution Overview
Problem
Thin yarns are prone to loosening and dropping off when captured between winding bobbins and a connection member, leading to unstable tension and potential failure in yarn threading.
Innovation Solution
A connection member with a base portion, paired attachment units, stoppers, a guide surface, and a capturing claw is designed to securely hold yarns by guiding them radially inward and using a capturing claw to prevent loosening, with a receiving surface and protruding portion to prevent drop-off, allowing for reliable yarn capture and retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thin yarns are captured between winding bobbins and connection member, then yarn threading is enabled, but the thin yarns are likely to drop off and loosen
Solution Approach 1:
The connection member is divided into functional segments: base portion for structural support, paired stoppers for positioning, guide surface for yarn direction control, and capturing claw for secure yarn retention. This segmentation allows each component to perform its specific function optimally, preventing thin yarns from loosening while maintaining reliable capture.
Solution Approach 2:
The guide surface acts as an intermediary element between the winding bobbins and the capturing claw. It guides the yarn radially inward in a controlled manner, ensuring smooth transition and preventing sudden tension changes that could cause thin yarns to loosen or drop off.
2Ease of manufacture
If conventional sandwiching method is used to hold yarn ends, then yarn threading is achieved, but thin yarns are less likely to be tightly held
Solution Approach 1:
The guide surface performs a preliminary action by guiding the yarn radially inward before the yarn reaches the capturing claw. This pre-positioning ensures that thin yarns are properly oriented and tensioned before being captured, preventing loosening during the threading process while maintaining operational simplicity.
Solution Approach 2:
The capturing claw changes the physical state of yarn retention from passive sandwiching to active mechanical engagement. By using the claw's geometric shape to hook and secure the yarn, the system transforms the retention mechanism to provide stronger holding force suitable for thin yarns without complicating the threading process.
3Reliability
If yarns are guided and captured by connection member, then yarn loosening is prevented, but device complexity increases
Solution Approach 1:
The connection member is designed as a multi-functional component that simultaneously provides structural support (base portion), positioning (paired stoppers), guidance (guide surface), and yarn capture (capturing claw). This integration of multiple functions into a single component achieves reliable yarn tension stability without proportionally increasing device complexity, as all functions are combined in one element rather than requiring separate components.
Data Source
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Figure 3(a)~3(b)
AI summary
An object of the present invention is to reliably capture yarns without loosening the yarns in yarn threading to winding bobbins attached to a connection member. A connection member 60 is configured to connect two winding bobbins B2a and B2b, which are provided for winding at least one running yarn Y, to be aligned in a predetermined axial direction. The connection member 60 includes (i) a base portion 61 which is sandwiched by the two winding bobbins B2a and B2b aligned in the axial direction and (ii) paired attachment units 62 which are provided on both sides of the base portion 61 in the axial direction, the two winding bobbins B2a and B2b being attachable to the paired attachment units 62. The base portion 61 includes (i) a guide surface 73 configured to guide at least one running yarn Y (yarn Yb) radially inward and (ii) a capturing claw 72 configured to capture the at least one running yarn Y (yarn Yb) guided radially inward by the guide surface 73.