Weaving Machine Fastener Head Geometry for Self-Locking Fixation
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Solution Overview
Problem
Existing fixing devices for weaving machines require manual holding to prevent the fastener from rotating out of the support groove, reducing operator workability during the fixing process.
Innovation Solution
A fastener with a rectangular parallelepiped head and a cylindrical shank, featuring a slot and projections, is designed to be inserted into a support groove and rotated to secure the support, ensuring the head remains in contact with the groove walls, preventing rotation and maintaining stability without manual holding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the operator holds the fastener manually during fixation, then the fastener position can be maintained, but the operator's workability and efficiency are reduced
Solution Approach 1:
The fastener's T-shaped head automatically regulates its own rotation through geometric constraints. When inserted and rotated, the long sides of the head contact the groove walls, self-regulating the position and maintaining contact without requiring manual holding, thus improving operator efficiency
Data Source
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AI summary
A fastener (46) of a weaving machine includes a head (49); a shank (48) connected to the head (49); and an external-thread portion (50) formed on the shank (48). The shank (48) protrudes out of the front opening (26) with the head (49) placed in the support groove (18). The head (49) is rotated around an axis (P) of the shank (48) with rotation of the shank (48) so that the head (49) is held in the support groove (18). The head (49) has an approximately quadrilateral shape that has a pair of long sides (61, 62, 71, 72) and a pair of short sides (63, 64, 73, 74). At least one of the short sides (63, 64, 73, 74) has a straight portion (66, 69, 76, 79). The straight portion (66, 69, 76, 79) intersects at a right angle an imaginary orthogonal line (Q) that passes through the axis (P).