Textile Machine Deflection Roller With U-Shaped Thread Guide Groove
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Solution Overview
Problem
Existing mechanical thread storage devices in textile machines struggle to reliably guide threads with lateral forces during the winding process, leading to thread slippage and damage to components due to the design of thread guide grooves, particularly when the axis of rotation is parallel to the traversing plane.
Innovation Solution
A mechanical thread storage device with a stationary input-side deflection roller and a movably mounted deflection roller having V-shaped surfaces, and an output-side deflection roller with a U-shaped thread guide groove, ensuring the thread is securely guided and preventing lateral slippage under lateral forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a V-shaped thread guide groove is used on the output-side deflection roller, then the thread guidance is simple and manufacturing is easy, but the thread slippage occurs under lateral forces during winding
Solution Approach 1:
The patent applies different groove cross-sectional shapes to different locations of the thread guide roller. The input-side roller uses a V-shaped groove while the output-side roller uses a U-shaped groove. This local differentiation allows each groove to be optimized for its specific function: the V-shaped groove for simple manufacturing and the U-shaped groove for preventing thread slippage under lateral forces during the winding process.
2Device complexity
If the axis of rotation of the deflection roller is arranged parallel to the traversing plane, then the thread storage device structure is simplified, but the thread strongly acts upon the oscillating thread guide causing damage to components
Solution Approach 1:
The patent differentiates the groove design between input-side and output-side deflection rollers. The output-side roller, which is subject to strong lateral forces from the traversing thread, is equipped with a U-shaped groove that provides better containment and reduces harmful thread actions on components, while the input-side roller uses a simpler V-shaped groove where such forces are less critical.
3Reliability
If a U-shaped thread guide groove is used on the output-side deflection roller, then thread slippage is prevented under lateral forces, but the device complexity increases
Solution Approach 1:
The patent implements a differentiated groove design where only the output-side deflection roller uses a U-shaped groove to prevent thread slippage under lateral forces, while the input-side roller maintains a simpler V-shaped groove. This localized application of the more complex U-shaped groove minimizes overall device complexity while ensuring reliability where it is most needed.
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 U-shaped thread guide groove on the output-side deflection roller effectively prevents thread slippage and damage, ensuring reliable thread guidance and easy re-threading after breaks, while the V-shaped surfaces on input-side rollers maintain secure guidance without lateral forces.
Implementation Method 1
a thread store (4) arranged in front of the paraffining device (5), with which the changes in the thread winding speed which occur when winding a cross-wound bobbin (19) are compensated for
Implementation Method 2
the stationary, input-side thread deflection roller (38) and the movably mounted thread deflection roller (36) have a V-shaped thread running surface (7) and the stationary, output-side thread deflection roller (39) has a thread running surface (7) in which a U-shaped thread guide groove (32) is incorporated
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a thread deflection roller (39) for a mechanical thread storage unit (4) arranged in the area of the thread change triangle (9) of a work station (10) of a textile machine producing cross-wound bobbins, with which the changes in thread winding speed occurring during the winding of a cross-wound bobbin (19) due to the thread change are compensated. According to the invention, the thread deflection roller (39) has a thread running surface (7) in which a U-shaped thread guide groove (32) is incorporated.