Positive Yarn Feeder Guide Layout for Easier Threading
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Solution Overview
Problem
Existing yarn feeders for warping machines are difficult to thread due to their laterally adjacent and closely spaced arrangement, complicating manual operations and access, especially when multiple feeders are involved and threading is performed at heights.
Innovation Solution
A positive yarn feeder with a guide that surrounds the yarn winding spool, featuring a guiding surface to facilitate the insertion and extraction of a weft taker rod, allowing easier threading by directing the rod around the spool, even when feeders are adjacent and closely spaced.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple yarn feeders are arranged laterally adjacent and at a short distance apart in an array, then the yarn feeding precision and flexibility are improved, but the threading operations become awkward and difficult
Solution Approach 1:
The patent moves the yarn guiding eyelets from a lateral arrangement to a front-facing arrangement on the support structure. This dimensional change allows operators to access the eyelets from the front rather than having to reach laterally between closely spaced feeders, effectively solving the threading difficulty while maintaining the compact lateral arrangement of feeders for precision yarn feeding.
2Productivity
If the array of yarn feeders is made long to accommodate several dozen feeders, then the productivity is improved, but the operator cannot access the rear side of innermost feeders laterally
Solution Approach 1:
By repositioning the yarn guiding eyelets to the front of the support structure rather than at the rear, the patent enables operators to access all eyelets from the front of the array. This allows operators to thread yarns in long arrays without needing to reach over or climb the array, making the system scalable to dozens of feeders while maintaining ease of operation.
3Area of stationary object
If the operator works at a height on a ladder during threading operations, then the yarn feeders can be positioned higher for better space utilization, but the operator's comfort and safety are compromised
Solution Approach 1:
The patent positions the yarn guiding eyelets at the front of the support structure at a height that is easily accessible to standing operators. This eliminates the need for operators to work on ladders or elevated platforms, allowing the yarn feeders to be positioned at ergonomic heights that improve both space utilization and operator safety.
Data Source
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AI summary
An electric motor (14) is fixed to a support and turns a yarn winding spool (16) which is extended around an axis (A) and is provided with a peripheral winding surface (16a) on which a yarn (Y) is adapted to be wound. A guide (32) partially surrounds the yarn winding spool (16) and is provided with a guiding surface (32a) which faces the peripheral winding surface (16a) so as to form an interspace (33) adapted to guide the insertion and deformation, around the yarn winding spool (16), of a weft taker rod (P). The guide (32) has a free input end (32') and a free output end (32") which form, between the peripheral winding surface (16a) and the guiding surface (32a), an input passage (34') and an output passage (34") for the weft taker rod (P), respectively.