Segmented Wire Gripper for Deformation-Free Perimeter Pressure
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Solution Overview
Problem
Conventional wire grippers with wire stretching functions deform electric wires due to sandwiching, leading to reduced gripping force, potential damage, and increased tool size and weight, which compromises operability and safety during cutting operations.
Innovation Solution
A wire gripper design featuring a first and second gripping body with semi-circumferential grooves and mating parts in an alternately repeated pattern of recesses and projections, allowing for efficient perimeter pressure application without deformation, and an adjustable link mechanism for varying grip pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the electric wire is sandwiched between the electric wire receiver and the electric wire retainer to grip it, then the gripping force is applied to the wire, but the wire is squashed and deformed, reducing the effective gripping force
Solution Approach 1:
The gripping surface is segmented into multiple recessed portions arranged in the wire stretching direction. This segmentation allows the gripping force to be distributed across multiple contact points rather than concentrated at a single point, reducing localized deformation while maintaining overall gripping effectiveness
Solution Approach 2:
The recessed portions create localized contact zones with specific geometric characteristics (depth, width, spacing) that are optimized for different regions of the wire. This local quality variation ensures uniform pressure distribution and prevents excessive deformation in any single area while maintaining stable gripping
2Reliability
If the sandwiching force is increased to complement the force lost due to wire deformation, then the gripping stability is improved, but the wire is damaged and the tool size and weight must be increased
Solution Approach 1:
By segmenting the gripping surface into multiple recessed portions, the total gripping force is distributed across multiple contact points. This allows achieving the required gripping stability with lower overall sandwiching force, preventing wire damage while maintaining reliable grip
Solution Approach 2:
The recessed portions are designed with specific dimensions and spacing that allow the wire to be gripped in a manner that adapts to wire diameter variations. This dynamic adaptation ensures stable gripping without requiring excessive force that would cause damage
3Force
If the sandwiching force is increased to account for deformation, then the gripping force is sufficient, but the tool members must be reinforced with increased size and weight
Solution Approach 1:
The segmented recessed portions enable effective gripping with distributed lower force, allowing the use of lighter tool members without compromising gripping capability. The segmentation efficiency reduces the need for heavy reinforcement
4Stability of the object's composition
If the recessed surfaces are formed to hold the wire surfaces stably, then the wire is secured, but spaces are formed on lateral sides allowing wire expansion and force loss
Solution Approach 1:
The recessed portions create localized contact zones with optimized geometry that provide stable wire positioning while minimizing lateral expansion space. The specific depth and width of each recessed portion are designed to balance positioning stability with force efficiency
Data Source
AI summary
Provided is a wire gripper which is capable of efficiently supplying a gripping force without inviting an increase in size and weight. A wire gripper grips a sheathed wire which is illustrated by an imaginary line. The wire gripper has a base part which pivotally supports link pieces on the lower side thereof so as to be swingable. The link pieces have ends, respectively, both of which are coupled to an operating arm so as to form a parallel link. Illustrated are an upper gripping body (a first gripping body) and a lower gripping body (a second gripping body), by which the sheathed wire is sandwiched. Of the gripping bodies, the upper gripping body is secured to the base part. The lower gripping body is coupled to the link pieces so as to be retractable from the upper gripping body.