Yarn Winder Direction Changing Unit Axial Control
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Solution Overview
Problem
Existing yarn winders face issues with yarn path variation due to passive movement of the direction changing unit, leading to potential interference with nearby members and increased apparatus size, as the unit is easily swung in the horizontal direction.
Innovation Solution
A yarn winder design where the direction changing unit is freely movable at an angle of 45 degrees or less to the guide direction, with power applied in the guide direction to maintain yarn tension, and a controller adjusts the unwinding and winding speeds to control the unit's position, using an optical sensor for precise detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the direction changing unit is passively movable in the radial direction to maintain yarn tension, then yarn tension variation is suppressed, but the yarn path varies significantly causing interference with nearby members and increased apparatus size
Solution Approach 1:
The direction changing unit is moved from passive movement in the radial direction to controlled movement in the axial direction. By changing the dimension of movement from horizontal (radial) to vertical (axial), the yarn path variation is suppressed while maintaining tension stability, thereby reducing the required apparatus space.
Solution Approach 2:
The invention changes the movement parameter of the direction changing unit from free radial movement to constrained axial movement within a specific range. This parameter change allows the unit to maintain yarn tension while preventing excessive yarn path variation that would cause interference with nearby members.
2Reliability
If the direction changing unit is freely movable to maintain yarn tension, then tension variation is suppressed, but the unit is easily swung in the horizontal direction causing yarn path variation
Solution Approach 1:
The direction changing unit's movement is constrained to the axial direction rather than allowing free movement in the horizontal direction. This dimensional constraint ensures that the unit can adjust to maintain yarn tension while preventing horizontal swinging that would cause yarn path variation.
Solution Approach 2:
A guide structure acts as an intermediary between the direction changing unit and the yarn. This guide structure restricts the movement of the direction changing unit to the axial direction, serving as a mediator that allows tension maintenance while preventing horizontal displacement that would destabilize the yarn path.
3Object-affected harmful factors
If a wide space is ensured around the yarn path to avoid member interference, then yarn interference is prevented, but the apparatus size increases
Solution Approach 1:
By changing the direction changing unit's movement from radial to axial, the yarn path is stabilized and does not vary significantly in the horizontal direction. This eliminates the need for wide clearance spaces around the yarn path, thereby preventing member interference while reducing the required apparatus size.
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
This design effectively suppresses yarn path variation, maintains consistent tension, and prevents interference by stabilizing the yarn path, allowing for a compact apparatus with improved followability and reduced mass of the direction changing unit.
Implementation Method 1
the yarn is always pulled by this direction changing unit. Because of this, a predetermined tension is applied to the yarn. Because the direction changing unit is freely movable, the variation in the tension of the yarn is suppressed
Implementation Method 2
using an optical sensor for precise detection
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3(a)~3(b)
AI summary
A yarn winder 1 is configured to form a wound package Pw by unwinding a yarn Y from a yarn supply package (Ps) which is rotating and by winding the yarn onto a winding bobbin Bw which is provided at least on one side of the yarn supply package Ps in an axial direction of the yarn supply package Ps, the yarn winder 1 comprising a direction changing unit 23 which is provided outside the yarn supply package Ps in a radial direction of the yarn supply package Ps and which is configured to guide the yarn to one side in a guide direction having a component in the axial direction, the direction changing unit 23 being configured to be movable in a moving direction, the moving direction and the guide direction forming an angle θ2 which is 45 degrees or less, and a predetermined power being applied to the direction changing unit 23 at least toward the other side in the guide direction, characterized in that the direction changing unit 23 is configured to be freely movable in the moving direction and by further comprising: an unwinding driving unit 22 configured to rotationally drive the yarn supply package Ps; a winding driving unit 32 configured to rotationally drive the wound package Pw; a position detection unit 43 configured to detect a position of the direction changing unit 23 in the moving direction; and a controller 13 configured to control at least one of the unwinding driving unit 22 and the winding driving unit 32 based on a detection result provided by the position detection unit 43.