Divided Needle Plate Base for Sewing Machine Maintenance
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Solution Overview
Problem
The existing multi-thread chain stitch sewing machines with seam ravel preventing apparatus face difficulties in maintaining and adjusting the sewing machine components due to the large and cumbersome needle plate base, requiring labor-intensive and time-consuming operations for maintenance and adjustments, which can lead to compromised stitch performance and ravel prevention.
Innovation Solution
The sewing machine is designed with a divided needle plate base into left and right sections, allowing for easier attachment and maintenance, where the left needle plate base can be removed for adjustments and maintenance without affecting the stopper mechanism's air tubes, providing a wider operating space and simplifying the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the needle plate base is made large and integrated to support all components, then the structural stability and component integration are improved, but the ease of maintenance and adjustment deteriorates
Solution Approach 1:
The needle plate base is divided into a left needle plate base and a right needle plate base. The left base supports the thread hanging hook and needle plate, while the right base supports the stopper mechanism and air cylinders. This segmentation allows the left base to be removed independently for maintenance without affecting the stopper mechanism's air tubes, solving the contradiction between structural stability and ease of maintenance.
2Device complexity
If the needle plate base is made large and integrated, then the component integration is improved, but the operating space for maintenance deteriorates
Solution Approach 1:
By dividing the needle plate base into left and right sections, the left base can be removed to provide wide operating space for maintenance activities. The right base remains integrated with the stopper mechanism and air cylinders, maintaining component integration where needed while creating accessible maintenance space.
3Strength
If the needle plate base is made cumbersome, then the structural support capability is improved, but the ease of handling and maintenance deteriorates
Solution Approach 1:
The heavy and cumbersome needle plate base is segmented into two separate bases. The left needle plate base, which can be removed for maintenance, is lighter and easier to handle. The right needle plate base provides structural support for the stopper mechanism. This segmentation maintains overall structural support capability while improving ease of handling during maintenance.
4Device complexity
If the needle plate base is made large, then the component support capability is improved, but the time required for maintenance increases
Solution Approach 1:
By dividing the needle plate base into left and right sections, the left base can be quickly removed and reattached without affecting the stopper mechanism. This reduces maintenance time significantly compared to handling a large integrated base, while still providing adequate support capability for all components through the distributed structure.
Data Source
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AI summary
A needle plate base (11) in a multi-thread chain stitch sewing machine with a seam ravel preventing apparatus is divided into a left needle plate base ( 11L) for attaching a needle plate ( P) thereto and supporting a swinging support shaft (30) of a thread hanging hook (3); and a right needle plate base (11R) for fixedly supporting a stopper member (4) and a thread handling air cylinder (32) and a stopper air cylinder (42). The right needle plate base(llR) is fastened to a sewing machine bed (B). The left needle plate base (11L) is fastenably and unfastenably fastened to an upper surface of the bed(B) via screw members (102). Adj ustment of stitch performation, and maintenance, e.g., replacement of various kinds of components stored inside the bed, can extremely easily and simply be carried out without having much trouble and requiring labor and time, and therefore, the stitch performation and predetermined ravel preventing function can be constantly surely reproduced.