Yarn Winder Movable Catching Unit for Accurate Bobbin Threading
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Solution Overview
Problem
Existing yarn winders face inefficiencies in smoothly transferring yarns from distribution guides to bobbins due to narrow pitch and potential mis-catching or multiple yarns being caught by the first separator, leading to deteriorated threading efficiency.
Innovation Solution
A yarn winder design featuring a yarn catching unit with movable yarn catching portions that catch yarns near distribution guides, allowing for accurate and easy transfer to yarn holding portions, and a simplified structure that avoids contact with the contact roller, using swingable members and drive units for automated operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the first separator catches yarns at a location remote from the distribution guides, then the structure is simpler, but the yarn pitch is narrow causing mis-catching or multiple yarns being caught
Solution Approach 1:
The patent introduces a vertical dimension to the yarn catching mechanism by positioning the yarn catching portions above the distribution guides and using a vertical movement mechanism. This allows the catching portions to approach yarns from above, creating a new spatial dimension for yarn interception that avoids the pitch narrowing problem in the horizontal plane.
Solution Approach 2:
The patent introduces a yarn guiding member as an intermediary component between the distribution guides and the yarn catching portions. This mediator guides the yarns vertically upward, ensuring they are properly positioned for catching and preventing mis-catching or multiple yarns being caught by the same holding unit.
2Productivity
If the holding units catch yarns with narrow pitch, then the separator can be positioned remotely, but threading efficiency deteriorates due to failed catching or multiple yarns per holding unit
Solution Approach 1:
The patent divides the yarn handling function into two distinct segments: the distribution guides that distribute yarns horizontally, and the yarn catching portions that catch yarns vertically. Each holding unit is assigned to catch only one yarn from its corresponding distribution guide, ensuring one-to-one correspondence and preventing multiple yarns from being caught by the same holding unit.
Solution Approach 2:
The patent replaces the traditional horizontal suction-based yarn catching mechanism with a vertical mechanical catching system. The yarn catching portions move vertically to approach yarns from above, and the holding units use mechanical clamping action instead of suction, providing more reliable and precise yarn control.
3Ease of operation
If yarns are converged toward the suction gun, then suction holding is maintained, but the pitch narrows making smooth handover from first separator to second separator impossible
Solution Approach 1:
The patent introduces dynamic movement to the yarn catching portions, which can move vertically between a home position (above distribution guides) and a handover position (near the second separator). This dynamic positioning allows the system to maintain stable yarn holding at the home position while enabling smooth handover to the second separator at the handover position, eliminating the pitch narrowing problem.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enables precise and efficient yarn threading to bobbins with reduced component complexity, preventing yarn damage and enhancing operational ease by maintaining consistent intervals and automating the transfer process.
Implementation Method 1
a state in which an operator sucks and holds the yarns by a suction gun is typically maintained
Data Source
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AI summary
Yarns having been threaded to distribution guides are accurately and easily are accurately and easily threaded to bobbins. A yarn winder 5 includes: bobbin holder 13 to which bobbins B are attached; fulcrum guides 15; a contact roller 17 which is provided above the bobbin holder 13 and below the fulcrum guides 15; a yarn catching unit 40; and a yarn threading unit 45. The yarn catching unit 40 includes yarn catching portions 41. The yarn threading unit 45 has yarn holding portions 51 aligned in the front-rear direction, and is configured to receive, by the yarn holding portions 51, the yarns Y caught by the yarn catching unit 40, and to guide the yarns Y to positions where the yarns Y are threaded to the respective bobbins B. The yarn catching unit 40 is arranged to catch the yarns Y at positions that are closer to the fulcrum guides 15 than the contact roller 17 in the up-down direction. Furthermore, the yarn catching unit 40 is arranged to be movable to the handover position where the caught yarns Y are handed over to the yarn holding portions 51.