Cam Buckle Lateral Strap Insertion Stiffness
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Solution Overview
Problem
Cam buckles for fastening load straps are difficult to operate, especially when the strap end is frayed or when wearing gloves, and existing solutions that allow lateral insertion often compromise buckle stiffness and durability.
Innovation Solution
A cam buckle design featuring a pivotable locking element that displaces between closed and open positions, allowing lateral insertion of the load strap while maintaining stiffness and integrity, with a biasing element to ensure secure clamping and prevent accidental release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the strap is threaded into the buckle in the conventional manner, then the buckle structure remains simple, but the operation becomes difficult especially when wearing gloves or when the strap end is frayed
Solution Approach 1:
The buckle is divided into functional segments: a frame portion, a cam portion with gripping surface, and a locking element with crossbar. This segmentation allows the locking element to be independently displaced to open the insertion gap without complicating the overall structure, resolving the contradiction between ease of operation and structural simplicity.
Solution Approach 2:
The locking element is made dynamically displaceable between closed and open positions. When displaced to the open position, it creates a gap allowing lateral strap insertion without threading. This dynamic capability enables easy operation while maintaining a relatively simple buckle structure that can adapt during use.
2Ease of operation
If the locking element is displaced to allow lateral strap insertion, then ease of operation improves, but the buckle stiffness and integrity may be compromised
Solution Approach 1:
The locking element is designed as a separate, relatively small component that can be displaced independently. This segmentation allows the main buckle frame to remain rigid and maintain its stiffness, while only the lightweight locking element moves to enable insertion, thus preserving overall structural strength.
Solution Approach 2:
The displacement capability is localized to the locking element rather than the entire buckle frame. The crossbar and attachment arm are designed to be displaceable while the main frame remains fixed and rigid. This local quality approach enables easy strap insertion without compromising the global stiffness and integrity of the buckle structure.
3Productivity
If conventional threading is required, then the buckle structure remains simple, but significant time is consumed especially when securing small cargo
Solution Approach 1:
The locking element is pre-configured to be displaceable to an open position, creating readiness for immediate lateral strap insertion. This preliminary preparation eliminates the time-consuming threading process, allowing operators to quickly secure cargo even when wearing gloves or dealing with frayed strap ends.
Solution Approach 2:
The dynamic displacement of the locking element between open and closed positions enables rapid strap insertion and securement. This dynamic mechanism, while adding some complexity, dramatically improves productivity by eliminating the lengthy threading process, especially beneficial when securing small cargo where time is critical.
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 design enables quick and easy operation of cam buckles, maintaining stiffness and durability, allowing for efficient tensioning of load straps without the need for threading, while ensuring secure clamping and preventing accidental release.
Implementation Method 1
a biasing element to ensure secure clamping and prevent accidental release
Data Source
AI summary
A buckle for fastening a load strap, comprising a buckle frame, a crossbar extending between side arms of the frame, and a pivotable cam arranged between the side arms. The crossbar forms part of a locking element, which is displaceable between a closed position, in which the crossbar extends between the side arms, and an open position, in which the crossbar is separated from at least one of the side arms, such that a load strap is laterally insertable between the cam and the crossbar.The displaceable locking element may provide great ease of access for laterally inserting a load strap. The integrity of the buckle frame is maintained, increasing the stiffness of the buckle and its ability to withstand tension from a load strap.