Spun Yarn Winding Apparatus Bobbin Position Sensor Guide Adjustment
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Solution Overview
Problem
The existing spun yarn winding apparatuses face issues with yarn threading failures due to dimensional errors in bobbins, particularly when many bobbins are attached to one holder, leading to accumulated positional deviations and failures in yarn threading.
Innovation Solution
The apparatus adjusts the position of the guide based on the detected position of the new bobbin using a bobbin position sensor, ensuring accurate yarn threading by aligning the guide with the slit, even with dimensional errors, and includes a pitch changing mechanism to adjust guide positions for improved threading success.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the guide is arranged to be movable in the axial direction of the bobbin by a cylinder, then the guide can move to capture and thread the yarn, but when the bobbin length has dimensional errors, the guide cannot be positioned accurately relative to the slit
Solution Approach 1:
The patent introduces a feedback mechanism where the actual position of the bobbin is detected and used to adjust the guide position dynamically. The system detects the bobbin's axial position, calculates the deviation from the standard position, and feeds this information back to the cylinder control to adjust the guide's axial position accordingly, ensuring accurate alignment with the slit despite dimensional variations.
Solution Approach 2:
The patent transforms the static guide positioning system into a dynamic one. Instead of fixing the guide at a predetermined position based on standard bobbin dimensions, the guide's axial position is made dynamically adjustable through the cylinder mechanism, allowing it to adapt to actual bobbin position variations in real-time during the threading operation.
2Productivity
If many bobbins are attached to one bobbin holder, then production efficiency increases, but dimensional errors accumulate and cause significant positional deviations
Solution Approach 1:
The system implements feedback control for each bobbin on the holder. The detection device measures the actual axial position of each bobbin, and this information is fed back to individually adjust the guide position for each bobbin, compensating for accumulated dimensional errors even when many bobbins are processed simultaneously.
Solution Approach 2:
The patent applies local quality adjustment by allowing each guide to be independently positioned according to its corresponding bobbin's actual dimensions and position. Instead of using a uniform positioning approach for all bobbins, each guide-bobbin pair receives customized positional adjustment, ensuring accurate threading for each individual bobbin despite variations in the group.
3Device complexity
If the guide position is fixed based on standard bobbin size, then the device structure is simple, but threading fails when bobbin dimensions deviate from standard
Solution Approach 1:
The patent converts the fixed guide positioning system into a dynamic adjustable one. The guide's axial position is no longer fixed but can be adjusted via the cylinder mechanism based on real-time detection of bobbin position, enabling the system to adapt to dimensional variations while maintaining threading reliability.
Solution Approach 2:
The system incorporates a feedback loop where the detection device monitors actual bobbin positions and feeds this information back to the guide positioning mechanism. This feedback enables automatic compensation for dimensional deviations, ensuring reliable threading without requiring complex manual intervention or overly complicated mechanical structures.
Data Source
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AI summary
A yarn is successfully threaded into a slit when a bobbin to which the yarn is wound is switched to a new bobbin, even if the length of the bobbin has a dimensional error from a predetermined standard size. A yarn threading mechanism 30, which is configured to thread a yarn into a slit S formed in the outer circumferential surface of each of new bobbins B when bobbins B on each of which a yarn is wound are switched to the new bobbins B, includes guides 31 which are provided to correspond to the respective bobbins B, are movable in an axial direction, and each threads a yarn into the slit S, a driving unit 32 configured to move the guides 31 in the axial direction, and a bobbin position sensor 22 configured to detect the position in the axial direction of a predetermined part of the bobbins B. Based on a detection result of the bobbin position sensor 22, the driving unit 32 is controlled so that the positions of the guides 31 are adjusted in the axial direction.