Sewing Machine Embroidery Frame Interference Prevention
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Solution Overview
Problem
Sewing machines with clamp-type embroidery frames face interference issues with the embroidery presser foot during attachment and detachment, leading to potential damage and reduced work efficiency, as they have a greater vertical dimension than conventional frames, necessitating a solution to prevent interference and optimize the detachment process.
Innovation Solution
A sewing machine with a detection mechanism to identify specific types of embroidery frames, a control unit to manage the frame movement, and a thread cutting mechanism to automatically move the frame to a predetermined position for safe detachment, preventing interference with the presser foot and enhancing work efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a clamp-type embroidery frame with greater vertical dimension is used, then the clamping function is improved, but the frame may interfere with the embroidery presser foot during attachment and detachment
Solution Approach 1:
The control unit automatically moves the carriage to a predetermined position where the embroidery frame does not interfere with the presser foot before the attachment/detachment operation is performed. This preliminary positioning action prevents the interference problem while maintaining the benefits of the clamp-type frame design.
2Object-affected harmful factors
If the embroidery frame is moved to a predetermined removing position after every completion of embroidery sewing, then interference with the presser foot is prevented, but work efficiency is reduced due to unfruitful movement
Solution Approach 1:
The system dynamically adjusts the carriage position based on the detected frame type. For clamp-type frames, the carriage is automatically moved to the predetermined position to prevent interference. For conventional frames, no movement is made, eliminating unfruitful motion. This dynamic adaptation optimizes both safety and efficiency.
Solution Approach 2:
The detection mechanism identifies the frame type and provides feedback to the control unit, which then decides whether to move the carriage. This feedback loop ensures that the predetermined position movement is only executed when necessary (for clamp-type frames), preventing unnecessary movements and maintaining work efficiency.
3Strength
If the clamp mechanism portion of the embroidery frame has greater vertical dimension, then the clamping capability is enhanced, but the frame cannot pass through the space between the presser foot and needle plate upper surface
Solution Approach 1:
The carriage is automatically positioned at a predetermined location where sufficient clearance exists between the presser foot and needle plate, allowing the tall clamp mechanism to pass through without collision. This preliminary positioning enables easy attachment and detachment of clamp-type frames.
Data Source
AI summary
A sewing machine capable of embroidery sewing includes a plurality types of embroidery frames which hold a workpiece cloth; a carriage that has the embroidery frame detachably attached thereto by sliding the embroidery frame in a predetermined direction; a frame moving unit that moves the carriage in two directions intersecting in a horizontal plane; a control unit that controls the frame moving unit; a detection that detects a type of embroidery frame attached to the carriage; an operation instructing portion that allows a user to instruct movement of the embroidery frame to a predetermined position suitable for attachment/detachment of the embroidery frame, the operation instructing portion outputting a movement instructing signal to the control unit when operated; and a validating unit that validates operation of the operation instructing portion provided that an attachment of a specific type of embroidery frame is detected by the detection mechanism.