Linear Member Gripping Structure for Single-Wire Selection
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Solution Overview
Problem
Conventional linear member gripping devices face challenges in reliably gripping a single wire due to the structure of the gripping parts, which can lead to the possibility of gripping multiple wires instead of a single one.
Innovation Solution
A linear member gripping device is designed with a first and second gripping member, each with a gripping surface, a protrusion, and drive parts that allow for precise control of their positions to ensure only one linear member is gripped, utilizing a limitation part to prevent multiple wires from being gripped.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the gripping part has a structure where the deviation gap between two gripping pieces is reduced toward the root side, then the gripping force is improved, but multiple wires may be gripped instead of a single wire
Solution Approach 1:
The gripping part is divided into multiple gripping pieces (first gripping piece and second gripping piece) with different gap characteristics. The first gripping piece has a smaller deviation gap for strong gripping, while the second gripping piece has a larger deviation gap to prevent multiple wires from being gripped simultaneously. This segmentation allows each piece to perform a specific function that collectively solves the contradiction.
Solution Approach 2:
Different regions of the gripping part have different gap sizes tailored to their specific functions. The first gripping piece located at the root side has a small deviation gap to provide strong gripping force, while the second gripping piece has a large deviation gap to allow only single wire passage. This local differentiation of gap sizes resolves the contradiction between gripping force and single wire reliability.
2Strength
If the deviation gap between gripping pieces is made small to grip wires firmly, then the gripping strength is improved, but the risk of gripping multiple wires increases
Solution Approach 1:
The gripping part is segmented into multiple gripping pieces with different gap characteristics. The first gripping piece provides strong gripping with a small deviation gap, while the second gripping piece ensures single wire selection with a large deviation gap. This segmentation allows simultaneous achievement of strong gripping and accurate single wire selection.
Solution Approach 2:
The gripping pieces are designed asymmetrically with different deviation gap sizes. The first gripping piece has a smaller gap for strength, while the second has a larger gap for selectivity. This asymmetric design allows each piece to optimize for its specific function, resolving the contradiction between gripping strength and selection accuracy.
3Device complexity
If the gripping part structure is simplified, then the device complexity is reduced, but the ability to reliably grip a single wire is compromised
Solution Approach 1:
The gripping part is segmented into multiple gripping pieces that work together to achieve reliable single wire gripping. This segmentation provides the necessary functional differentiation without requiring complex external mechanisms, thus maintaining relatively simple device structure while improving reliability.
Solution Approach 2:
The gripping pieces are designed to automatically perform their respective functions based on their structural characteristics. The first gripping piece automatically provides strong gripping force with its small gap, while the second gripping piece automatically ensures single wire selection with its large gap. This self-service mechanism reduces the need for complex control systems.
Data Source
AI summary
A linear member gripping device includes: a first gripping member that abuts a linear member; a second gripping member that abuts the linear member and has a protrusion; a first drive part and a second drive part that change relative positions of the first and second gripping members; and a limitation part that limits movement of the linear member sandwiched between the first and second gripping members at a predetermined limitation position.