Loom Frame Offset Attachment Parts Vibration Control
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Solution Overview
Problem
Looms experience severe vibrations during the beating operation, which negatively impact the quality of woven fabrics due to the rocking shaft's support on side frames, and these vibrations worsen with increased operation speed.
Innovation Solution
The frame design includes offset attachment parts on the side frames for beam members, reducing the length of the beam members and preventing bending, thereby enhancing vibration-proof characteristics by positioning attachment parts more inwardly than the reference surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If beam members are attached at positions on the inner surface of side frames, then the structure is simple and easy to manufacture, but the frame experiences severe vibrations during beating operation
Solution Approach 1:
The attachment parts are positioned not only on the inner surface but also extend to the outer surface of the side frames, utilizing the third dimension (depth/thickness) of the side frame structure. This spatial arrangement shortens the beam member length and reduces vibrations while maintaining manufacturing simplicity
Solution Approach 2:
The attachment parts are strategically positioned at specific locations on the side frames (both inner and outer surfaces) rather than uniformly distributed. This localized positioning optimizes vibration reduction at critical areas while maintaining overall structural integrity and ease of manufacture
2Productivity
If the loom operates at higher speed, then productivity increases, but vibrations become more severe
Solution Approach 1:
The frame structure is designed in advance with offset attachment parts that preemptively counteract the increased vibrations caused by high-speed operation. The shortened beam members and optimized attachment positioning create inherent vibration resistance before high-speed operation begins, enabling higher productivity without exacerbating vibrations
3Stability of the object's composition
If beam members are made longer to connect side frames, then the frame structure is more stable, but the beam members bend and vibrations increase
Solution Approach 1:
Instead of increasing beam member length in the horizontal direction to improve stability, the solution utilizes the vertical dimension (depth of side frame) by positioning attachment parts on both inner and outer surfaces. This reduces the required beam member length while maintaining or improving frame stability through optimized spatial configuration
Data Source
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AI summary
A frame (1) of a loom includes both side frames (2) connected to each other by means of a plurality of beam members (3a, 3b, 3c and 3d) attached to attachment parts on inner surfaces (9) of each of the side frames, and each side frame is configured to support a heddle frame guide (12) configured to guide up-and-down movement of a heddle frame (11) of an opening device. In the frame (1) of a loom, at least one of the pair of side frames (2 and 2) has, as a reference surface (10), a part located in a position of the inner surface (9) in which the heddle frame guide (12) in a warp direction is supported and the attachment part to which at least one of the plurality of beam members (3a, 3b, 3c and 3d) is attached is formed to be an offset attachment part (17; 18) located on a more inner side of the frame (1) than the reference surface (10).