Variable Speed Strapping Tensioning Actuator for Sensitive Loads
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Solution Overview
Problem
Existing strapping apparatuses often damage pressure-sensitive articles and apply non-uniform tension to band loops, particularly around articles with edges, due to fixed tensioning mechanisms.
Innovation Solution
The strapping apparatus features an actuating element that allows for variable rotational speeds of the tensioning device by adjusting the intensity of actuation, enabling gentle and controlled application of the strapping band through different actuating travels and forces, providing perceptible feedback and sensor-aided control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed tensioning mechanism is used, then the strapping apparatus is simple to operate, but pressure-sensitive articles can be damaged and non-uniform tension is applied to the band loop
Solution Approach 1:
The patent implements variable rotational speed control for the tensioning element, allowing the operator to adjust the speed dynamically during the strapping operation. This dynamic adjustment enables gentle application to pressure-sensitive articles while maintaining uniform tension distribution, resolving the contradiction between operational simplicity and harm prevention.
Solution Approach 2:
The patent changes the operational parameter of rotational speed from a fixed value to a variable range. By providing multiple selectable rotational speeds for the tensioning element, the system can adapt to different article types and sensitivity levels, preventing damage while ensuring uniform band loop tensioning.
2Productivity
If high rotational speed is used for tensioning, then productivity is improved, but pressure-sensitive articles are damaged
Solution Approach 1:
The system allows dynamic adjustment of rotational speed during the tensioning process. High speeds can be used for durable articles to maintain productivity, while lower speeds are available for pressure-sensitive articles to prevent damage, thus resolving the contradiction between productivity and harm prevention.
Solution Approach 2:
By providing a range of rotational speed values rather than a single fixed speed, the system enables optimization of the tensioning parameter according to article characteristics. This parameter variability allows high productivity for robust items while protecting sensitive articles, eliminating the need to choose between speed and safety.
3Device complexity
If fixed actuation is used, then the device structure is simple, but uniform tension distribution across the band loop cannot be achieved
Solution Approach 1:
The patent introduces variable speed control for the tensioning element, allowing the operator to adjust rotational speed during different phases of the strapping operation. This dynamic control enables uniform tension distribution across the entire band loop while maintaining relatively simple device architecture through electronic control rather than complex mechanical mechanisms.
Data Source
AI summary
In the case of a strapping apparatus for strapping articles to be packaged with a strapping band, said apparatus having a tensioning device for applying a band tension to a loop of a strapping band, wherein the tensioning device is provided with a tensioning element that is provided to apply a band tension and to engage in the strapping band and is drivable in rotation, and having a connecting device for creating a permanent connection, in particular a welded connection at two regions, located one on top of the other, of the loop of the strapping band, a possibility is intended to be created by way of which damage to articles to be packaged that is attributable to the tensioning operation, and non-uniform applications of tensile stress to a band loop are avoided or at least reduced. For this purpose an actuating element for the tensioning device is proposed, with which different rotational speeds of the tensioning element are achievable, by way of different intensities of actuation of the actuating element, during the operation of tensioning the strapping band.