Loom Tension Detection Apparatus Support Rigidity
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Solution Overview
Problem
The existing tension detection apparatus for looms has low support rigidity, leading to a risk of damage from high loads applied to the tension detection lever and load cell, particularly when detecting high-tension warp yarns or woven cloth, due to the concentration of loads on the arm portions and the potential for damage from repeated loads during the easing motion.
Innovation Solution
The apparatus is enhanced by supporting the second shaft, which extends in the weaving-width direction and is supported by the loom frame at positions different from those supported by the tension detection lever, distributing the load and increasing overall support rigidity, allowing the load cell to detect tension while reducing the risk of damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the second shaft is supported only by the tension detection lever, then the structure is simple, but the support rigidity is low and the load on the tension detector is high
Solution Approach 1:
The support function for the second shaft is segmented between two locations: the tension detection lever and the loom frame. This divides the load-bearing responsibility, reducing the burden on any single component while increasing overall system rigidity.
Solution Approach 2:
The loom frame provides localized support at a position different from where the tension detection lever supports the shaft. This creates different structural characteristics at different locations along the shaft, with the frame providing rigid support and the lever providing detection-capable support.
2Reliability
If the load is concentrated on the arm portions of the tension detection lever, then the detection mechanism is simple, but the risk of damage from high loads increases
Solution Approach 1:
Part of the load that would otherwise be concentrated on the tension detection lever's arm portions is extracted and transferred to the loom frame through the second shaft's additional support point. This removes excessive load from the detection mechanism while preserving its functionality.
Solution Approach 2:
The second shaft acts as an intermediary element that transfers load between the tension detection roller and both the tension detection lever and the loom frame. This mediator distributes the force path, preventing concentration on single vulnerable points.
3Measurement precision
If the second shaft support position is the same as the tension detection lever support position, then the structure is compact, but vibration-induced disturbances increase
Solution Approach 1:
The support function is extracted from a single location to two separate locations. By positioning the loom frame support at a different position than the tension detection lever support, the patent extracts vibration and instability from the detection path, improving measurement precision.
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 configuration increases the overall support rigidity of the apparatus, reduces the load on the tension detector, suppresses vibration-induced disturbances, and enhances the signal-to-noise ratio of the tension detection signal, enabling accurate detection of warp yarn tension while minimizing the risk of apparatus damage.
Implementation Method 1
The force is applied to the load cell as a tensile load, and the load cell detects the load.
Data Source
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AI summary
A tension detection apparatus for a loom includes a tension detection roller (1) that extends in a weaving-width direction between a pair of loom frames (F) and around which warp yarns (T) or a woven cloth is wound, a tension detection lever (3) provided on at least one of the loom frames (F) and connected to an end portion of the tension detection roller (1) so as to support the end portion, and a tension detector (5) connected to the tension detection lever (3). The tension detection lever (3) includes a base portion (3a) and an arm portion (3c). The base portion (3a) is rotatably supported on the at least one of the loom frames (F) by means of a first shaft (7) that is parallel to the tension detection roller (1). The arm portion (3c) extends from the base portion (3a) and supports a second shaft (9) that supports the tension detection roller (1). The second shaft (9) extends in the weaving-width direction and is supported by the at least one of the loom frames (F), on which the tension detection lever (3) is supported, at a position different in the weaving-width direction from a position at which the second shaft (9) is supported by the tension detection lever (3).