Height-Adjustable Selvedge Device Heddle Holders
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing selvedge devices for weaving machines face challenges in efficiently adjusting heddle eyelet positions, leading to larger reciprocating movements and reduced weft yarn locking speed, especially when modifying or replacing heddles, due to limited adjustability and susceptibility to wear.
Innovation Solution
A selvedge device with height-adjustable heddle holders attached to drive bodies via coupling elements, allowing precise positioning and reducing friction, featuring a compact design with adjacent heddle holders performing the same reciprocating movement to minimize wear and enhance mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If heddle holders are fixed to drive bodies without height adjustability, then device complexity is reduced, but manufacturing precision of heddle eyelet positioning deteriorates
Solution Approach 1:
The heddle holders are made height-adjustable relative to the drive bodies through coupling elements, transforming a static fixed connection into a dynamic adjustable one. This allows the system to adapt heddle eyelet positions precisely while maintaining operational flexibility, resolving the contradiction between structural simplicity and positioning precision.
2Reliability
If heddle eyelets are positioned away from the center of the selvedge shed, then reliability of avoiding rapier contact is improved, but speed of weft yarn locking deteriorates due to larger reciprocating movements
Solution Approach 1:
The height-adjustable heddle holders enable dynamic positioning of heddle eyelets at the optimal location (center of selvedge shed) while the coupling elements provide flexibility to maintain reliable operation. This resolves the contradiction by allowing the system to achieve both high speed (through minimal reciprocating movement) and high reliability (through proper positioning).
3Ease of manufacture
If heddle holders are not height-adjustable, then ease of manufacture is improved, but ease of operation deteriorates when modifying or replacing heddles
Solution Approach 1:
The coupling elements provide a simple yet effective height-adjustment mechanism that maintains ease of manufacture while dramatically improving ease of operation. The adjustable design allows quick repositioning of heddle holders when modifying or replacing heddles, resolving the contradiction between manufacturing simplicity and operational flexibility.
4Adaptability or versatility
If adjacent heddle holders perform deviating reciprocating movements, then adaptability of weave structures is improved, but friction and wear increase
Solution Approach 1:
The height-adjustable heddle holders with coupling elements create a more stable mechanical connection that reduces friction and wear during reciprocating movements. This allows adjacent heddle holders to perform deviating movements for weave structure adaptability while maintaining component reliability through reduced wear.
Data Source
Figure 1~2
Figure 3~5
Figure 6
AI summary
The present invention relates to a selvedge device (1), comprising at least two pairs of heddle holders (2) for holding heddles (3) on either side, a drive device for driving the two pairs of heddle holders (2) by reciprocating movements, in which the drive device comprises at least two drive bodies (4) and each pair of heddle holders (2) is attached to a said drive body (4), and in which the heddle holders (2) of at least one pair of heddle holders (2) are attached to the corresponding drive body (4) so as to be height-adjustable with respect to this corresponding drive body (4).