Belt Loop Slackening Apparatus for Sewing Machines
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Solution Overview
Problem
Conventional sewing machines for belt loops require time-consuming manual adjustment of slackening amounts, leading to inefficiencies and inconsistencies in belt loop production, and the slackening member often obstructs the setting operation.
Innovation Solution
A sewing machine with a belt loop slackening apparatus featuring a clamp member, hold members, a transporting motor, drive control means, a moving member, an extensible drive cylinder, a loop slackening motor, and input set means, allowing precise control of the slackening member's position based on set values to facilitate efficient slackening and prevent operator interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the slackening member is positioned near the set position of the member to be sewn, then the slackening function can be performed, but it provides an obstacle when setting the member to be sewn, worsening the efficiency of the setting operation
Solution Approach 1:
The slackening member is designed to be movable between a work position and a retracted position. During setting operations, it moves to a retracted position to avoid obstructing the operator. During slackening operations, it moves to the work position to perform its function. This dynamic positioning resolves the contradiction by allowing the slackening member to be present only when needed.
2Productivity
If manual visual adjustment of the slackening amount is used, then the slackening amount can be adjusted, but it takes time and has low reproducibility
Solution Approach 1:
The patent replaces manual visual adjustment with an automated control system that includes a sensor to detect the position of the slackening member and a controller to automatically adjust the slackening amount based on detected values. This substitution eliminates the need for manual visual confirmation, significantly reducing adjustment time and improving reproducibility through automated, precise control.
Solution Approach 2:
The system incorporates a sensor that detects the position of the slackening member and feeds this information back to the controller. The controller uses this feedback to automatically adjust the slackening amount, ensuring precise and reproducible results without manual intervention. This closed-loop feedback mechanism resolves the contradiction by providing both speed and precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution significantly reduces the time needed for setting slackening amounts, enhances productivity, improves reproducibility, stabilizes product quality, and prevents the slackening member from obstructing the operator's workflow during setting operations.
Implementation Method 1
a drive cylinder (20) which is supported on the moving member and is extensible and retractable; a slackening member (18) having one end supported on the drive cylinder, and the other end being movable forward and backward internally of the tape member
Implementation Method 2
a loop slackening motor (6) connected to the moving member and capable of moving the slackening member along the transporting direction
Implementation Method 3
a transporting motor (32) for moving the hold members along a transporting direction of the tape member
Data Source
Figure 1
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AI summary
A belt loop slackening apparatus 1 includes: a moving member 11 disposed laterally of a main body of a sewing machine and movable reciprocatingly along a transporting direction of a member to be sewn in a sewing operation of the sewing machine; a drive cylinder 20 supported on the moving member such that the drive cylinder can be expanded and contacted; a slackening member 18 having one end supported on the drive cylinder, and the other end being movable forward and backward internally of the member to be sewn; a loop slackening motor 6 connected to the moving member and capable of moving the slackening member along the transporting direction; input set means 35 for inputting a set value of a slackening amount of the member to be sewn; and drive control means 36 for controlling the loop slackening motor in such a manner that, when sewing the member to be sewn to a body cloth, in order to slacken the member to be sewn by a given amount, the slackening member can be moved to a folded position of the slackening member according to the set value.