Magnetic Star Wheel Flow Control for Conveyor Safety
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Solution Overview
Problem
Conventional conveyor systems lack flexibility and safety, particularly when handling lighter objects or freestanding items, as they often require protective covers and are not designed to manage asynchronous operations or provide controlled spacing and grouping efficiently.
Innovation Solution
A flow control device featuring a star wheel with magnetic tips and part-circular recesses, driven by an electric motor with a one-way bearing, allowing for controlled object flow, spacing, and grouping, while disengaging if a foreign object is detected to prevent injury.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional stop members are used to control object flow, then objects can be stopped and spaced, but the system lacks flexibility for asynchronous operations and requires protective covers for safety
Solution Approach 1:
The star wheel is made dynamically controllable through a drive unit that can adjust its rotation speed and direction. This allows the device to adapt to different operational modes (stopping, spacing, grouping) by changing the drive parameters, providing flexibility for asynchronous operations without adding complex multi-component systems
Solution Approach 2:
The single star wheel mechanism serves multiple functions: stopping objects, providing spacing, grouping objects, and controlling flow. By making one component multi-functional, the system achieves versatility for asynchronous operations without proportionally increasing device complexity
2Reliability
If stop members are designed for worst-case scenarios to prevent injury, then safety is improved, but the device becomes more complex and less efficient
Solution Approach 1:
The patent replaces traditional mechanical safety mechanisms (protective covers, interlocks) with a magnetic field-based control system. The drive unit can be stopped or reversed when foreign objects are detected, providing safety through intelligent control rather than physical barriers, thus reducing device complexity while maintaining reliability
Solution Approach 2:
The system incorporates feedback mechanisms to detect foreign objects and automatically adjust the drive unit's operation. This closed-loop control ensures safety by responding to real-time conditions, eliminating the need for overly complex mechanical safety designs
3Reliability
If protective covers are added to stop cylinders and screw feeders, then user safety is improved, but the device becomes more complex and space-consuming
Solution Approach 1:
The patent eliminates the need for protective covers by replacing mechanical control elements (stop cylinders, screw feeders) with a star wheel driven by a controlled motor. The magnetic field-based drive system can be safely stopped or reversed upon detecting foreign objects, providing user safety without requiring additional protective structures
Solution Approach 2:
The invention extracts and removes the problematic components (stop cylinders, screw feeders) that require protective covers. By using a star wheel mechanism with controlled motor drive, the patent eliminates the hazardous elements entirely, reducing both device complexity and space requirements while maintaining safety
4Adaptability or versatility
If all objects are released at the same time in synchronous systems, then prediction of system performance is easy, but flexibility is reduced and objects must wait for long operations
Solution Approach 1:
The drive unit enables dynamic control of the star wheel's rotation, allowing individual objects to be released at different times based on operational requirements. This dynamic adjustment provides flexibility in handling asynchronous operations while minimizing waiting time, as the system can adapt to varying processing speeds at different workstations
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 solution provides a flexible and safe conveyor system that can stop, space, or group objects effectively without the need for protective covers, reducing the risk of damage and injury, and can be easily repositioned along the conveyor track.
Implementation Method 1
the flow control device comprises a magnet arranged at the outer periphery of the star wheel, where the magnet is arranged to hold the star wheel in a predefined position by magnetic interaction with the magnetic member
Data Source
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AI summary
Flow control device (1) for a conveyor system (40) comprising a body (2), a drive unit (3) attached to the body (2), a shaft member (4) of a star wheel (5) rotationally arranged in the body (2) and connected to the drive unit (3), wherein the star wheel (5) is arranged to be driven by the drive unit (3), where the star wheel (5) is provided with a number of tips (14) and part-circular recesses (15) arranged between the tips (14), where an one way bearing (6) is arranged between the star wheel (5) and the drive unit (3), where each tip (14) is provided with a magnetic member (13) and where the flow control device (1) comprises a magnet (16) arranged at the outer periphery of the star wheel (5), where the magnet is arranged to hold the star wheel (5) in a predefined position by magnetic interaction with the magnetic member (13). The advantage of the invention is that a reliable, cost-effective and safe flow control device for a conveyor system is provided.