Pallet Switching Conveyor With Cam-Guided Upright Buffer Flow
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Solution Overview
Problem
Existing conveyor systems in production workshops, particularly for machine tools like press brakes, suffer from inefficiencies due to manual handling interruptions, shared resource waiting times, and reliance on human handlers, leading to reduced productivity and downtime.
Innovation Solution
A pallet switching conveyor system with a supporting structure, mobile frames, and a cam switching mechanism that allows simultaneous switching of pallets without changing their orientation, enabling continuous operation and buffer stock management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual handling operations are used to supply and remove parts, then the operator can flexibly manage part handling, but the machine operates at reduced productivity due to interruptions and waiting time
Solution Approach 1:
The system enables self-service by providing automatic part provision and removal through the conveyor system with buffer stock, eliminating the need for manual handling operations while maintaining operational flexibility. The automated system manages its own supply chain without human intervention.
Solution Approach 2:
The buffer stock mechanism implements preliminary action by pre-storing parts in the conveyor system before they are needed at the machine workstation. This advance preparation eliminates waiting time and ensures continuous operation, as parts are already positioned and ready for immediate use.
2Ease of operation
If a handler controls multiple workstations, then machine operators can focus solely on their tasks, but the handler becomes a bottleneck due to waiting time and sequential handling operations
Solution Approach 1:
The automated conveyor system performs self-service by independently managing part transportation and buffer stock across multiple workstations. This eliminates the handler's role in part handling, allowing operators to focus on core tasks while the system autonomously coordinates material flow between stations.
Solution Approach 2:
The system segments the handling function by separating part transportation from workstation operations. The conveyor system operates as an independent module that serves multiple workstations simultaneously, eliminating the sequential bottleneck created by a single handler coordinating multiple locations.
3Productivity
If pallets are switched using conventional conveyor systems, then parts can be transported, but the pallets must be moved upside down on lower paths which complicates the system design
Solution Approach 1:
The system inverts the conventional approach by maintaining pallets in an upright orientation throughout the entire conveyor loop rather than flipping them upside down on lower paths. This inversion simplifies the mechanical design by eliminating the need for complex switching mechanisms that would be required to handle inverted pallets.
Solution Approach 2:
The system resolves the complexity by transitioning to a three-dimensional conveyor configuration where pallets move through vertical levels while maintaining horizontal orientation. The offset rail system allows pallets to be transported through different spatial dimensions without rotating or inverting them, simplifying the overall mechanism.
4Productivity
If buffer stock is implemented to ensure continuous operation, then productivity increases, but the system requires additional space and complexity for stock management
Solution Approach 1:
The system merges the buffer stock function into the existing conveyor structure rather than adding a separate storage system. The conveyor loops back on itself to form an integrated buffer mechanism, combining transportation and storage functions in a single unified system that minimizes additional complexity.
Solution Approach 2:
The conveyor system performs multiple functions simultaneously: it transports parts, stores buffer stock, and manages inventory flow. This multi-functionality eliminates the need for separate dedicated buffer storage systems, reducing overall device complexity while maintaining continuous operation capability.
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
Enhances productivity by minimizing handling interruptions and optimizing workflow flexibility, allowing uninterrupted machine operation and improved autonomy in automated environments.
Implementation Method 1
a cam switching system for the pairs of rollers in the guiding grooves, the cam switching system being configured to guide the pairs of rollers so that the first pair of rollers follows the first path and the second pair of rollers follows the second path
Implementation Method 2
each mobile frame of the at least two mobile frames comprising a first pair of rollers and a second pair of rollers on lateral sides of the mobile frame; a conveyor system located on the supporting structure and configured to allow movement of the at least two mobile frames
Data Source
AI summary
A pallet switcher includes: a supporting structure; at least two mobile frames, each for carrying a pallet, each mobile frame of the at least two mobile frames including a first pair of rollers and a second pair of rollers on lateral sides of the mobile frame; a conveyor system located on the supporting structure for allowing movement of the at least two mobile frames, the conveyor system being connected to a drive shaft; a set of guiding grooves forming a closed loop having separate rails, and a guiding path for each mobile frame, the set of guiding grooves having a first path and a second path, the grooves receiving the rollers of the mobile frames; and a cam switching system for the pairs of rollers in the guiding grooves, the cam switching system guiding the pairs of rollers so that the first pair of rollers follows the first path.