Cable Tie Tensioning Tool Acme Thread Calibration
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Solution Overview
Problem
Existing hand tools for tensioning and cutting cable ties require excessive operator force, leading to fatigue and inconsistent tension due to mechanical linkages that increase tension during severing, potentially causing stretching or breakage of the ties.
Innovation Solution
A handheld tool with a selective tension adjustment system using an acme thread cam and knob, allowing for rapid and reliable selection of preselected tension levels through a rotatable mechanism with incremental and predetermined settings, featuring a locking latch and calibration mechanism for precise tension control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical linkages are used to connect trigger to tensioning mechanism, then the tool can be operated with simple trigger mechanism, but the tension in cable tie varies with operator's grip position and increases above preselected value during tensioning
Solution Approach 1:
The patent replaces the mechanical linkage system connecting the trigger to the tensioning mechanism with a sensor-based electronic control system. The sensor detects trigger position and sends signals to a controller that precisely controls the tensioning motor, eliminating the mechanical connection that caused tension variation with grip position. This substitution maintains ease of operation while achieving consistent, preselected tension values.
2Force
If excessive force is required on trigger, then the tool can achieve sufficient tensioning force, but operator fatigue occurs after small number of cable ties installed
Solution Approach 1:
The patent replaces the purely mechanical force transmission system with an electromechanical system where an electric motor provides the tensioning force. The motor is controlled by a sensor that detects trigger position, allowing the system to generate sufficient tensioning force without requiring the operator to apply excessive manual force on the trigger, thereby reducing operator fatigue.
3Strength
If tension increases above preselected value immediately prior to severing, then the cable tie can be securely tensioned, but stretching, weakening or breakage of tie occurs during severing
Solution Approach 1:
The patent employs a sensor that continuously monitors the tension in the cable tie and provides feedback to a controller. The controller adjusts the motor-driven tensioning mechanism to maintain the preselected tension value, preventing excessive tension increase immediately prior to severing. This feedback control ensures the cable tie remains securely tensioned without exceeding the predetermined force threshold that would cause stretching, weakening, or breakage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The tool reduces operator fatigue and ensures consistent tension, preventing stretching or breakage of cable ties by allowing precise tension adjustment and locking, enabling efficient and reliable cutting of cable ties.
Implementation Method 1
an acme thread cam and knob for selectively changing the preselected tie tension to a selected tension value
Implementation Method 2
The tension biasing member may comprise a spring, two springs or a plurality of springs
Data Source
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AI summary
A hand held tool for the tensioning and severing of cable ties, including reciprocating means for tensioning the cable tie tail, locking means to prevent further tensioning upon the attainment of a preselected tension level in the tie tail, and severing means to sever the tie tail from the cable tie head. The tool includes a tension adjustment system and an independent calibration mechanism.