Integrated Strap Retractor Tensioner for Controlled Take-Up
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Solution Overview
Problem
Conventional strap tensioners are inconvenient and unsafe due to their separate arrangement from the webbing strap, requiring excessive strap deployment, manual retrieval, and posing safety hazards from loose surplus strap.
Innovation Solution
An integrated automatic strap retractor tensioner with a winding, tightening, and braking assembly, utilizing a coil spring for controlled strap retraction and retrieval, ensuring the strap length matches the use requirement and facilitating safe, automated strap management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If conventional separate strap tensioners are used, then the tensioning function is achieved, but the strap length cannot be controlled and excess strap remains
Solution Approach 1:
The patent integrates the retractor mechanism directly into the tensioner body, combining the strap storage, payout control, and tensioning functions into a single integrated unit. This merging eliminates the need for separate strap deployment and retrieval operations, automatically controlling strap length while maintaining ease of use through a unified device structure.
2Loss of time
If manual strap retrieval is required, then the tensioning operation is complete, but the retrieval process is cumbersome
Solution Approach 1:
The retractor mechanism is designed to automatically rewind and retrieve the strap after the tensioning operation is complete. The spring-loaded reel system self-actuates to pull in the excess strap without requiring manual intervention, making the retrieval process both quick and convenient while eliminating the cumbersome manual gathering and storing operations.
3Adaptability or versatility
If excess strap is left loose, then the strap length is sufficient for different cargos, but safety hazards occur
Solution Approach 1:
The integrated retractor mechanism dynamically controls the strap length during and after the tensioning operation. It allows the strap to be deployed to the necessary length for securing different cargo configurations, then automatically retracts and secures any excess strap, maintaining adaptability while eliminating safety hazards from loose surplus material.
4Adaptability or versatility
If the strap is fully deployed for different cargo needs, then the adaptability is improved, but the retrieval and stowing becomes cumbersome
Solution Approach 1:
The retractor mechanism automatically performs the retrieval and stowing function after the strap has been deployed to accommodate different cargo requirements. The spring-driven reel system self-actuates to wind in the strap and store it compactly within the tensioner housing, eliminating the need for manual retrieval and stowing operations while maintaining full adaptability for various cargo configurations.
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 solution provides controlled strap take-up, reduces excess strap, enhances safety, and simplifies the retrieval process, offering improved usability and stability during load securing operations.
Implementation Method 1
a take-up assembly (5) connected to a side of the brake body and housing a coil spring, with the second contact surface of the winding rod connected to the coil spring within the take-up assembly
Data Source
AI summary
An automatic strap retractor tensioner comprises a winding assembly (winding rod, coupling shaft with first/second coupling gears; the third contact surface of the first gear engages the first contact surface of the winding rod for motion transmission), a tightening assembly (tightening body with slidably mounted first stop plate at inner mid-portion, rotatably coupled to the winding rod and equipped with a protective rubber handle), a braking assembly (brake body with rotatably mounted first brake plate at inner bottom and slidably mounted second brake plate at inner middle), and a take-up assembly (on the brake body’s side, housing a coil spring connected to the winding rod’s second contact surface for strap retraction). Their coordinated action reduces excess strap, enables controllable retraction speed, and enhances safety and usability.