Pivoting Roll Hubs for Mandrel-Free Web Loading
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Solution Overview
Problem
Conventional roll-feeding systems require precise placement and heavy mandrels, which are difficult to install and prone to breaking, and often restrict the use of lifting devices like cranes or forklifts due to restricted access, leading to inefficiencies and manual handling challenges.
Innovation Solution
A system using pivotably mounted hubs that transition between operational and deflected positions to support and handle rolls of web material without the need for an axle or mandrel, allowing for easier loading and unloading by tilting up and seating within the roll's tubular core.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional axle or mandrel is used to support the roll of web material, then the roll can be supported and handled, but the axle or mandrel becomes heavy (30-50 pounds), difficult to install, and prone to breaking
Solution Approach 1:
The patent extracts the mandrel from the system entirely and replaces it with hubs that engage the roll ends directly. The hubs are pivotably mounted and can be easily positioned to engage the roll ends without requiring insertion into a hollow core, eliminating the need for heavy mandrels and their associated installation difficulties and breakage risks
Solution Approach 2:
Instead of inserting a mandrel into the hollow core from the ends, the patent inverts the approach by having hubs engage the external surfaces of the roll ends. The hubs pivot from a loading position to engage the roll ends externally, reversing the conventional insertion method and eliminating the need for internal mandrels
2Manufacturing precision
If precise placement of mandrels is required, then the roll can be properly supported, but the installation process becomes time-consuming and reduces overall efficiency
Solution Approach 1:
The hubs are designed to self-align and self-position as they pivot from the loading position to engage the roll ends. The pivot mechanism automatically guides the hubs into proper engagement without requiring precise manual placement, and the hubs self-adjust to accommodate variations in roll dimensions
Solution Approach 2:
The patent introduces dynamic pivoting hubs that can move between a deflected loading position and an operational engagement position. This dynamic mechanism allows the hubs to automatically adjust their position and orientation during loading, eliminating the need for precise static placement and significantly improving loading efficiency
3Ease of operation
If restricted access to the mounting position is present, then conventional lifting devices cannot be used, but manual lifting becomes difficult and causes delay
Solution Approach 1:
The patent changes the loading approach from horizontal insertion to vertical engagement. The hubs are positioned vertically above or below the roll and engage by vertical movement and pivoting, allowing lifting devices to approach from overhead or below without requiring lateral access to the mounting position, thus resolving the restricted access problem
Solution Approach 2:
The pivotably mounted hubs act as intermediaries between the lifting mechanism and the roll. The hubs can be positioned in a deflected loading position that is accessible to lifting devices, then pivot to engage the roll ends, mediating the transfer of the roll without requiring direct access to the final mounting position
4Reliability
If heavy mandrels are used to support the roll, then the roll can be handled, but the overall system weight increases and manual handling becomes more difficult
Solution Approach 1:
The patent removes the heavy mandrel from the system and replaces it with lighter hubs that engage the roll ends externally. The hubs are pivotably mounted and can be easily positioned and removed, significantly reducing the weight that must be manually handled while maintaining reliable roll support capability
Solution Approach 2:
The hubs are designed as lightweight, easily replaceable components that can be quickly positioned and removed. Rather than using heavy, durable mandrels that are difficult to install and remove, the hubs function as temporary, lightweight engagement devices that are easily disposed of or repositioned after use
Data Source
AI summary
A web roll handling and loading system and methods employ hubs positioned on opposing sides of a roll of web material wound on a hollow tubular core. Hub faces have an annular shape configured to be seated in respective ends of the hollow tubular core. The hubs are pivotably supported for pivoting between an operational position and a deflected position. The roll of web material is loaded on the hubs by lifting it from beneath the hubs to deflect the hub faces arcuately upward, then lowering the roll to allow the hub faces to pivot downward and become seated in the ends of the hollow tubular core. Alternatively, the roll is loaded into a pick-up tool by lowering the pick-up tool downward to the roll so the hubs deflect arcuately upward, then raising the tool so the hubs pivot downward and become seated in the hollow tubular core.