Power-Operated Tarping System with Scissors Linkage
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Solution Overview
Problem
Manual installation and removal of heavy tarpaulin covers on flatbed transport vehicles are time-consuming and physically demanding, requiring multiple workers due to their weight and the need for repeated reuse.
Innovation Solution
A power-operated tarping apparatus with a vertically retractable lifting mechanism using scissors linkages and linear actuators, supported by an overhead beam, allows for efficient and automated tarpaulin handling, reducing labor and minimizing damage to the tarpaulin during use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual installation and removal of heavy tarpaulin covers is used, then the tarpaulin can be securely installed, but it requires multiple workers and is time-consuming
Solution Approach 1:
The patent replaces manual mechanical handling with a motorized winch system that automatically reels in and secures the tarpaulin. The winch mechanism, controlled by a motor, substitutes for multiple workers manually pulling and securing the heavy tarpaulin, thereby reducing both labor requirements and installation time.
Solution Approach 2:
The tarpaulin system incorporates self-securing features where the tapered end section automatically engages with retention members on the side rails as it is reeled in. This self-service mechanism reduces the need for manual intervention during the securing process, allowing faster installation with fewer workers.
2Reliability
If heavy tarpaulin covers are repeatedly reused, then cargo protection is maintained, but the tarpaulin suffers from physical strain and damage
Solution Approach 1:
The patent incorporates a protective receiving pocket at the forward end of the tarpaulin that receives and protects the tapered end section during storage and deployment. This preliminary protective structure prevents damage before the tarpaulin is even put into service, extending its usable life while maintaining protection reliability.
Solution Approach 2:
The system uses smooth guide rollers and rounded retention members that prevent sharp edges or rough surfaces from contacting and damaging the tarpaulin fabric. This beforehand cushioning approach protects the tarpaulin from abrasion and tearing during repeated use, extending its lifespan while maintaining cargo protection.
3Strength
If the tarpaulin is pulled taut during installation, then secure coverage is achieved, but the tarpaulin may be torn or damaged
Solution Approach 1:
The tarpaulin features a localized tapered end section with reinforced construction that gradually transitions to the main body. This local quality variation allows the end section to be pulled more tightly during installation without compromising the overall tarpaulin, as the tapered design distributes stress gradually rather than creating sudden stress concentration points that could cause tearing.
Solution Approach 2:
The winch system provides dynamic control during tarpaulin installation, allowing the operator to gradually increase tension rather than applying sudden force. The motorized winch can be controlled to reel in the tarpaulin at a controlled rate, maintaining sufficient tension for secure coverage while avoiding excessive force that could tear the material.
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 apparatus significantly reduces the time and labor required for tarpaulin installation and removal, extending the lifespan of the tarpaulins by minimizing physical strain and damage, while enabling faster and more efficient covering of cargo.
Implementation Method 1
The lift linkages move from raised folded positions to extended lower positions by a pair of horizontally disposed linear power actuators
Implementation Method 2
The lifting mechanism is comprised of two laterally spaced scissors linkages depending from opposite ends of a horizontal hanger secured to the trolley
Implementation Method 3
The lift linkages move from raised folded positions to extended lower positions
Implementation Method 4
The overhead beam serves as a support and guiding tracking for a trolley supporting a vertically retractable lifting mechanism
Implementation Method 5
The guide roller carrier includes a horizontal protection bar parallel to and below the guide roller. The guide roller carrier is releasably to the lateral sides of the transport trailer with the protection roller positioned to bear against the upper rear portion of the load
Data Source
AI summary
An apparatus is provided for tarping a cargo loaded on a flat bed vehicle which includes a pair of ruggedly constructed double scissors linkages carried by an overhead horizontal traveling trolley and connectable at their lower ends to the tarpaulin. A vertically adjustable horizontal roller is provided, over which the tarpaulin is pulled during its installation in covering relation to the loaded cargo.