Dual Crochet Sewing Machine for Knotted and Chain Stitches
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Solution Overview
Problem
Current industrial sewing machines require separate structures for different types of stitches, such as knotted and chain stitches, leading to increased costs and complexity for manufacturers and users due to the need for multiple machines to accommodate various stitch types.
Innovation Solution
A single sewing machine base with a dual crochet system, where one crochet is designed for continuous rotary motion for knotted stitches and another for reciprocating motion for chain stitches, allowing for both types of stitches to be made in combination or alternately, with adjustable stitch layout and distance settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate sewing machines are used for different stitch types (knotted and chain stitches), then each machine can be optimized for its specific stitch type, but the overall system complexity and cost increase due to requiring multiple machines
Solution Approach 1:
The patent combines two separate sewing machine systems into one by integrating a first crochet mechanism for knotted stitches and a second crochet mechanism for chain stitches within a single base. The transmission system allows both crochets to be driven simultaneously or alternatively, enabling the machine to perform both stitch types without requiring separate machines, thus reducing overall system complexity and manufacturing cost.
Solution Approach 2:
The sewing machine base is designed with universal functionality to accommodate multiple stitch types through the dual crochet configuration. The first crochet is adapted for knotted stitches while the second crochet is adapted for chain stitches, and both can operate within the same machine structure. This multi-functional design allows a single machine to replace multiple specialized machines.
2Device complexity
If a single machine structure is used for both knotted and chain stitches, then cost and complexity are reduced, but the machine must accommodate fundamentally different motion requirements (continuous rotary vs. reciprocating motion)
Solution Approach 1:
The transmission system is designed with dynamic characteristics that allow it to provide different motion patterns to the two crochets. The system can continuously rotate the first crochet for knotted stitches while simultaneously or alternatively providing reciprocating motion to the second crochet for chain stitches. This dynamic motion control enables the single machine structure to adapt to different stitch type requirements.
Solution Approach 2:
The crochet system is segmented into two independent but integrated mechanisms: a first crochet for knotted stitches and a second crochet for chain stitches. Each crochet can be independently controlled and positioned within the base. This segmentation allows each component to be optimized for its specific stitch type while both operate within the unified machine structure, resolving the conflict between structural simplicity and functional versatility.
3Reliability
If different crochet mechanisms are used for knotted and chain stitches, then each stitch type can be produced with optimal performance, but the machine requires substantial structural differences between the two systems
Solution Approach 1:
The patent merges the two different crochet mechanisms into a single integrated base structure. The first crochet with continuous rotary motion for knotted stitches and the second crochet with reciprocating motion for chain stitches are both housed and coordinated within the same base and transmission system. This merging maintains optimal performance for each stitch type while reducing the structural differences between systems, as both crochets share common support and control infrastructure.
Data Source
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AI summary
The invention concerns a sewing machine, preferably of the industrial type, with a base (1) designed to mechanically sew together two pieces of fabric by using different types of stitches thanks to the layout of means (5, 6, 7, 27) driven and adjusted according to the machine operator's requirements. In particular these means (5, 6, 7, 27) can be positioned at desired distances one from the other to ensure the proper positioning of the stitches in the desired zones.