Sewing Frame Drive Mechanism for Tubular Cloth Stability
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Solution Overview
Problem
Existing sewing frames face challenges in maintaining the accuracy and practicality of embroidery patterns on long tubular cloths, particularly with large or irregularly shaped items like jeans, due to issues such as hanging of the sewing frame, insufficient holding force, and the need for multiple frames to accommodate different cloth sizes and shapes.
Innovation Solution
A sewing frame with a rectangular support frame that allows the front and rear ends to be movable in the lateral direction, combined with a guide mechanism to prevent lateral movement and a front hang preventive mechanism to maintain the frame's position, enabling the sewing frame to be longer without hanging and ensuring accurate processing of various embroidery patterns without the need for multiple frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the sewing frame length L0 is made long to accommodate long tubular cloths, then the embroidery range is enlarged, but the front end of the sewing frame hangs downward reducing processing accuracy
Solution Approach 1:
The support frame is divided into front and rear frame side portions, with the front portion being movable in the lateral direction while the rear portion remains fixed. This segmentation allows the sewing frame to be supported at multiple points, preventing front end hanging while maintaining the ability to accommodate long tubular cloths.
Solution Approach 2:
The front frame side portion is designed to be movable in the lateral direction, allowing dynamic adjustment during operation. This mobility enables the support structure to adapt to the sewing frame's position and prevent hanging, while maintaining processing accuracy for long embroidery patterns.
2Length of moving object
If the sewing frame length is increased to process long tubular cloths, then the embroidery range is enlarged, but the force for holding the sewing cloth becomes insufficient
Solution Approach 1:
The support frame is segmented into front and rear portions with different mobility characteristics. The front movable portion can adjust to maintain optimal contact with the sewing cloth, ensuring sufficient holding force even when the sewing frame is extended to accommodate long tubular cloths.
Solution Approach 2:
The movable front frame side portion acts as an intermediary between the fixed rear support and the extended sewing frame. This intermediate structure transfers and distributes the holding force along the length of the sewing frame, maintaining adequate force for securing long tubular cloths without requiring excessive overall frame length.
3Length of moving object
If the sewing frame is made longer to accommodate large embroidery patterns, then the embroidery range is enlarged, but multiple frames are required for different cloth sizes and shapes
Solution Approach 1:
The support frame with its movable front portion provides a universal structure that can accommodate various cloth sizes and shapes. The same basic structure with adjusted dimensions can handle different embroidery patterns and cloth types, eliminating the need for multiple specialized frames.
Solution Approach 2:
The movable front frame side portion enables the structure to dynamically adapt to different cloth configurations. By adjusting the position and movement characteristics of the front portion, the same frame can accommodate various cloth sizes and shapes, providing versatility without requiring multiple frame designs.
4Length of moving object
If the sewing frame is made longer to process long tubular cloths, then the embroidery range is enlarged, but the interliner holding force at intermediate areas becomes insufficient
Solution Approach 1:
The support frame is segmented into front and rear portions with different mobility characteristics. The front movable portion can adjust to maintain optimal contact with the interliner at intermediate areas, ensuring sufficient holding force even when the sewing frame is extended to accommodate long tubular cloths.
Data Source
AI summary
A sewing frame for extending and holding a sewing cloth is provided with a supported portion, such as a shaft and an engagement portion, which is movably or rotatably supported at front and rear frame side portions of the rectangular support frame at the front and rear ends. A sewing frame drive mechanism includes a support mechanism for supporting the front and rear ends of the sewing frame movably at the front and rear frame side portions of the support frame which is movable in the longitudinal direction but not movable in the lateral direction. The sewing frame drive unit includes left and right protruding portions to the left and right of recess portions of a table, and a front hanging preventive mechanism formed of left and right frame side portions of the support frame movably disposed on the left and right protruding portions in the longitudinal direction.