Knitted Fabric Pull-Down Device With Segmented Guiding Plate
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Solution Overview
Problem
Conventional pull-down devices for knitted fabrics in flat knitting machines are large and cumbersome, making them difficult to install and requiring complex mechanisms for base section movement, which complicates the catching and pulling down process.
Innovation Solution
A pull-down device with a simplified configuration where the guiding plate is fixed to the base section, and an opening/closing mechanism allows the guiding plate to move between open and closed positions through deformation, eliminating the need for base section movement, and incorporating a catching/pull-down mechanism with a camshaft and pulley system for efficient fabric handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the base section is moved to open/close the guiding plate, then the guiding plate can be positioned correctly, but the device becomes large and cumbersome
Solution Approach 1:
The guiding plate is divided into a fixed base section and a movable open/close section. The open/close section can be displaced independently between open and closed positions relative to the fixed base section, allowing the guiding plate to perform its function without moving the entire base section, thus reducing device size and weight.
Solution Approach 2:
The open/close section of the guiding plate is designed to be dynamically displacable between open and closed positions. This dynamic component allows the guiding plate to adapt its configuration as needed while the main base section remains fixed, avoiding the need to move the entire heavy base section.
2Ease of operation
If the base section is moved to open/close the guiding plate, then the guiding plate can be positioned correctly, but the device becomes complex to install
Solution Approach 1:
The guiding plate is segmented into fixed and movable parts. The open/close section can be displaced independently using a simple mechanism relative to the fixed base section, avoiding the need for complex base section movement mechanisms and simplifying installation.
Solution Approach 2:
Only the open/close section of the guiding plate is designed to be dynamically displacable, while the base section remains fixed. This reduces the complexity of the overall system by limiting dynamic elements to only where necessary, simplifying both installation and maintenance.
3Ease of operation
If the base section is moved to open/close the guiding plate, then the guiding plate can be positioned correctly, but the adjusting process becomes time-consuming
Solution Approach 1:
The guiding plate is segmented so that only the open/close section needs to be adjusted, not the entire base section. This reduces the adjusting process to moving a smaller component, significantly reducing the time required for positioning and setup.
Solution Approach 2:
The dynamic open/close section can be quickly displaced between positions without requiring time-consuming adjustment of the entire base section. This localized dynamic capability reduces adjusting time while maintaining the necessary positioning functionality.
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
The solution results in a smaller, lighter pull-down device that is easier to install and maintain, with reduced complexity in adjusting the catching mechanism, enhancing the productivity and cost-effectiveness of the flat knitting machine.
Implementation Method 1
an opening/closing mechanism for displacing at least a part of each guiding plate between a closed position which is proximate to the knitted fabric passing path and an open position which is further separated from the knitted fabric passing path than the closed position
Implementation Method 2
a catching/pull-down mechanism for catching the knitted fabric drooped to a position facing the guiding plate and pulling down the knitted fabric toward a lower side
Data Source
Figure 1
Figure 2
Figure 3(A)~3(B)
AI summary
A pull-down device for a knitted fabric that has a simpler configuration than the conventional device and that can be easily installed with respect to the flat knitting machine is provided. A pull-down device 100 for a knitted fabric includes a pair of base sections 1, a guiding plate 2 arranged at a position facing a knitted fabric passing path 101 on an upper side of each base section 1, and a catching/pull-down mechanism 3 for catching the knitted fabric drooped to a position facing the guiding plate 2 and pulling down the knitted fabric toward a lower side. In the pull-down device 100 for the knitted fabric, the base section 1 is fixed to the flat knitting machine. The pull-down device 100 of the knitted fabric includes an opening/closing mechanism 4 for displacing at least a part of each guiding plate 2 between a closed position which is proximate to the knitted fabric passing path 101 and an open position which is further separated from the knitted fabric passing path 101 than the closed position.