Cloth Evaluation Apparatus for Piercing and Cutting Force Measurement
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Solution Overview
Problem
Conventional methods for evaluating the suitability of mounting members for buttons or eyelets on cloths are inadequate as they do not accurately assess the piercing and cutting properties of cloths, leading to mounting defects despite suitable thickness measurements.
Innovation Solution
A cloth evaluation apparatus with a measuring member that includes a piercing force measuring portion with a tapered tip and a cutting force measuring portion with a shear face, supported by a cloth supporting mechanism and load detecting means, allowing real-time measurement of forces applied during passage through the cloth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If cloth thickness is measured under predetermined pressure, then the suitability of mounting member can be preliminarily determined, but the piercing property and cutting property of the cloth cannot be accurately assessed
Solution Approach 1:
The measuring member is divided into multiple functional portions: a piercing force measuring portion with a tapered tip to measure piercing resistance, and a cutting force measuring portion with a shear face to measure cutting resistance. This segmentation allows each portion to specifically evaluate different aspects of cloth properties, thereby improving measurement accuracy for mounting suitability while maintaining comprehensive evaluation capability.
2Ease of operation
If a sharp part of mounting member is used to pass through the cloth, then the button can be mounted, but the piercing property and cutting property vary depending on cloth material, weaving, and knitting
Solution Approach 1:
The invention performs preliminary evaluation of the cloth's piercing and cutting properties before the actual button mounting process. By using the measuring member to simulate the mounting action and measure the forces required, the system predicts mounting success in advance, thereby improving reliability of the mounting operation while maintaining ease of the mounting process itself.
Solution Approach 2:
The load detecting means provides feedback on the piercing force and cutting force values during measurement. This feedback mechanism allows the system to assess whether the cloth properties are suitable for mounting, enabling operators to make informed decisions about mounting suitability before actually performing the mounting operation, thus improving mounting reliability.
3Device complexity
If cloth thickness alone is used to determine suitability, then the evaluation process is simple, but mounting defects occur due to inadequate assessment of piercing and cutting properties
Solution Approach 1:
The measuring member is divided into multiple functional portions: a piercing force measuring portion with a tapered tip to measure piercing resistance, and a cutting force measuring portion with a shear face to measure cutting resistance. This segmentation allows each portion to specifically evaluate different aspects of cloth properties, thereby improving measurement accuracy for mounting suitability while maintaining comprehensive evaluation capability.
Solution Approach 2:
The invention transitions from measuring only cloth thickness (a single geometric parameter) to measuring piercing force and cutting force (mechanical property parameters). By changing the measurement parameters from static geometric dimensions to dynamic mechanical responses, the system achieves more reliable assessment of mounting suitability without excessive complexity.
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
Enables accurate assessment of piercing and cutting properties, ensuring suitable mounting of buttons or eyelets by determining the precise forces required, thereby reducing mounting defects.
Implementation Method 1
a load detecting means for detecting a load being applied to the measuring member while the measuring part passes through the cloth
Data Source
Figure 1
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AI summary
A cloth evaluation apparatus can grasp the piercing property and the cutting property with a cloth in advance. The cloth evaluation apparatus (1) comprising: a measuring member (21, 71, 81) having, on its distal side, a measuring part (22) to pass through a cloth (c, d); a cloth/measuring part moving means (30, 40) for moving the cloth (c, d) or the measuring member (21, 71) so that the measuring part (22) passes through the cloth (c, d); a cloth supporting means (23, 23', 31') for supporting the cloth (c, d) at around a passing-through point, in the cloth (c, d), of the measuring part (22) from both sides of the cloth (c, d) when the measuring part (22) passes through the cloth (c, d); and a load detecting means (25) for detecting a load being applied to the measuring member (21, 71) while the measuring part (22) passes through the cloth (c, d). The measuring part (22) includes a piercing force measuring portion (22A, 72A) whose outer diameter gradually decreases toward its acute tip (22A') and, after the tip (22A') sticks the cloth (c, d), the piercing force measuring portion (22A, 72A) can pass through the cloth (c, d) while expanding a grain of the cloth (c, d). The measuring part (22) also includes a cutting force measuring portion (22B, 72B) adjacent proximally to the piercing force measuring portion (22A, 72A), the cutting force measuring portion (22B, 72B) having a shear face (22Bb) which can push a part of the cloth (c, d) in the passing direction to separate the part from the cloth (c, d) as the measuring part (22) passes through the cloth (c, d).