Manual Lasher Apparatus with Wire Tensioning
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Solution Overview
Problem
Conventional cable lashers are heavy, making them hazardous for workers, and they fail to maintain uniform tension on the lashing wire, leading to inconsistent lashing.
Innovation Solution
A manual lasher apparatus with a lightweight housing, a wire guide assembly, and a wire tensioning member that ensures consistent tension and prevents slackening, featuring a durable and ergonomic design to facilitate easy use and secure lashing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If conventional lasher machines are used, then lashing function is achieved, but weight is excessive causing worker injury risk
Solution Approach 1:
The lasher is divided into separate modular components including a handle assembly, housing, spool, and wire guide assembly that can be independently manufactured and assembled. This segmentation allows for optimization of each component's weight and function, reducing the overall system weight while maintaining lashing capability.
Solution Approach 2:
The patent employs a lightweight disposable wire guide assembly that is replaced rather than reused. This allows the main lasher body to remain lightweight without needing to accommodate durable, heavy-duty components that would be required for reusable designs, thereby reducing weight while achieving the lashing function.
2Manufacturing precision
If conventional lashers are used, then lashing operation is performed, but uniform tension cannot be maintained leading to inconsistent lashing
Solution Approach 1:
The wire guide assembly includes a tensioning member with a pulley system that provides mechanical feedback to the operator. As the lasher is pulled along the support strand, the pulley mechanism automatically adjusts wire tension through friction and mechanical advantage, providing continuous feedback that maintains uniform tension without requiring active operator control.
Solution Approach 2:
The tensioning member is designed to self-regulate wire tension during the lashing process. The friction between the wire and pulley surface, combined with the mechanical geometry of the assembly, automatically maintains consistent tension as the lasher moves, eliminating the need for external tension control mechanisms or skilled operator intervention.
3Weight of moving object
If lightweight design is implemented, then worker safety is improved, but structural strength may be compromised
Solution Approach 1:
The lasher employs composite construction combining lightweight materials such as aluminum or composite polymers for the housing and handle, with strategic use of high-strength materials only where structurally necessary. This selective material application maintains overall lightweight design while ensuring adequate strength for the lashing function.
Solution Approach 2:
The structural design concentrates material and strength only in localized areas where mechanical loads are highest, such as the wire guide assembly mounting points and handle grip areas. The remainder of the structure uses minimal material to reduce weight, achieving strength-to-weight optimization through non-uniform material distribution.
Data Source
AI summary
An apparatus for lashing a cable with a lashing wire includes a housing for containing a spool of lashing wire, a handle extending from the housing, a wire guide assembly, and a wire tensioning member. The wire guide assembly is supported above a top side of the housing adjacent to a wire outlet so that when the lashing wire is threaded through the wire guide assembly, the lashing wire is redirected toward a front end of the housing. The wire tensioning member is supported adjacent to the front end of the housing so that the lashing wire extending from the wire guide assembly can be threaded around the wire tensioning member and wrapped around the cable and a support strand.