Support bar and roll assembly with a coreless roll and a support bar
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Solution Overview
Problem
Existing support bars for coreless rolls in dispensing systems require complex guide mechanisms and multiple bearing journals for operation, which can be cumbersome and difficult to integrate with various dispenser types, especially when non-rotational surfaces are involved.
Innovation Solution
A support bar design featuring a first part with a projecting bearing journal and a second rotatable part with a rotary body latched within the first part's bore, allowing for adjustable bearing journals that can rotate relative to the support bar, accommodating different dispenser types and configurations, including coded guides and mounting projections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple bearing journals and complex guide mechanisms are used, then the support bar can operate in various dispenser types, but the device complexity increases and integration becomes cumbersome
Solution Approach 1:
The support bar is designed with a universal structure that can function in multiple dispenser types (coded guides, mounting projections, guide legs) without requiring different configurations. The single bearing journal design combined with resilient latching mechanisms enables the same support bar to adapt to various dispenser architectures, eliminating the need for multiple specialized designs.
Solution Approach 2:
The support bar is divided into distinct functional segments: a central bar portion, a resilient latching mechanism, and a bearing journal assembly. This segmentation allows each component to perform its specific function independently while maintaining overall simplicity. The bearing journal can be separated from the support bar for easy replacement without affecting the entire assembly.
2Ease of operation
If bearing journals are fixed to the support bar, then the structure is simpler, but the ability to rotate relative to the support bar is lost, reducing adaptability
Solution Approach 1:
The bearing journal is designed with a rotary body that can rotate relative to the support bar, transforming the static connection into a dynamic one. This rotational capability is essential for the unrolling operation, allowing the bearing journal to follow the rotational motion of the material web while maintaining its structural connection through the resilient latching mechanism.
Solution Approach 2:
The rotary body acts as an intermediary element between the support bar and the bearing journal surface. It mediates the rotational motion by allowing the bearing journal to rotate on the rotary body, which is itself latched to the support bar. This intermediate structure enables rotation while maintaining a secure connection to the support bar.
3Ease of repair
If resilient latching mechanisms are used for the rotary body, then replacement becomes easier, but the latching complexity increases
Solution Approach 1:
The resilient latching mechanism is designed to automatically engage and disengage the rotary body with the support bar without requiring additional tools or complex assembly procedures. The resilience of the latching elements allows for simple push-in installation and easy removal by applying slight force, enabling users to perform replacements themselves without specialized equipment or procedures.
Data Source
AI summary
A support bar has a central region for a material web wound to a coreless roll and a first and a rotatable second bearing journal each projecting beyond the roll. The support bar includes a first and a second part. The first part extends throughout the roll. A first end of the first part forms the first bearing journal. A second part, formed as a rotary body that is rotatable relative to the first part has a second end that forms the second bearing journal. A second end of the first part is formed with an axial bore and a first end of the second part is latched in the axial bore within the roll.