Sewing Fastener Stringer with Bent Tape Concealment
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Solution Overview
Problem
Conventional methods for sewing slide fasteners to attached bodies, such as seat covers, often result in exposed fastener tapes and element rows, leading to a poor appearance and degraded design, as the fastener tapes are inadvertently exposed along with the element rows, causing spacing issues and a less aesthetically pleasing product.
Innovation Solution
A method involving a sewing machine foot with a groove-shaped element guide section that allows the fastener tape to be bent and sewn in a way that the element rows are exposed while the fastener tape is concealed, using a U-shaped tape bent section and coil-shaped or zigzag-shaped continuous elements to create a visually appealing and designed product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional sewing methods are used to attach fastener stringers to attached bodies, then the sewing process is simple and straightforward, but the fastener tape and element rows become exposed, resulting in poor appearance and degraded design
Solution Approach 1:
The invention separates the fastener tape from the element rows by introducing a tape bent section that creates a U-shaped configuration. This segmentation allows the element rows to be exposed while the fastener tape is concealed behind the bent section, resolving the contradiction between simple manufacturing and aesthetic appearance.
Solution Approach 2:
The invention introduces a new spatial dimension by bending the fastener tape into a U-shape configuration. The tape bent section creates a three-dimensional structure where the fastener tape is positioned behind the element rows, allowing the element rows to be exposed while concealing the fastener tape, thus improving appearance without complicating the sewing process.
2Productivity
If the fastener tape is sewn directly to the attached body, then the sewing process is straightforward, but the fastener tape becomes exposed along with the element rows, causing spacing issues and poor aesthetics
Solution Approach 1:
The invention applies preliminary action by pre-forming the fastener tape into a U-shaped configuration with a tape bent section before the sewing process. This preliminary shaping allows the sewing machine to simply follow the pre-defined path, maintaining high sewing efficiency while ensuring the fastener tape is properly concealed and element rows are exposed for aesthetic purposes.
3Adaptability or versatility
If the element rows are exposed for design purposes, then the product designability is improved, but the fastener tape becomes inadvertently exposed, leading to spacing issues and degraded overall appearance
Solution Approach 1:
The invention extracts the fastener tape from the visible area by introducing the tape bent section. This extraction allows the element rows to be exposed for design purposes while the fastener tape is taken out and concealed behind the bent section, preventing inadvertent exposure and maintaining overall aesthetic appearance.
Data Source
AI summary
A method of sewing a fastener stringer includes the steps of conveying a fastener stringer and an attached body to a sewing section of a sewing machine in a state with the fastener stringer superposed on the attached body, and arranging an element guide section in the sewing section of the sewing machine, bending a fastener tape in a direction in which a tape bent section opens, guiding the element rows to the element guide section, and sewing the fastener tape to the attached body. Accordingly, the method enables a sewing line formed by a sewing thread to be disposed at a predetermined position and the fastener tape and the attached body to be easily and efficiently sewn together.