Continuous Unloading Mechanism for Chain Conveyor Gondolas
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Solution Overview
Problem
Current unloading devices in production lines are inefficient, as they require stopping product carrier gondolas during the discharge process, leading to increased cycle times and reduced run-out capacity, especially at the outlet of intermediate buffers where disturbances cause higher filling levels.
Innovation Solution
The unloading device employs a mechanism where product rows are pushed onto conveyor belts during the continuous downward movement of gondolas, using a servo-driven ejector and articulated conveyor belts, allowing simultaneous discharge of multiple trays without stopping the gondolas, thereby increasing the number of cycles and unloading capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If product carrier gondolas are stopped during discharge to push out product rows, then complete discharge is achieved, but cycle time increases and run-out capacity is reduced
Solution Approach 1:
The patent implements continuous discharge by enabling multiple product carrier trays to be discharged simultaneously while the gondola moves continuously. The outfeed conveyor is designed with multiple discharge positions that can receive product rows from different trays at the same time, eliminating the need to stop the gondola between discharges and maintaining continuous operational flow.
Solution Approach 2:
The discharge process is segmented into multiple parallel discharge positions on the outfeed conveyor. Instead of discharging all products sequentially from a single position (which requires stopping), the system divides the discharge function across multiple positions, allowing simultaneous discharge from different trays and maintaining continuous gondola movement.
2Productivity
If the outlet of the buffer clocks out faster to reduce filling level, then productivity increases, but the traditional pusher mechanism cannot achieve sufficient speed due to stop-and-go operation
Solution Approach 1:
The system achieves continuous high-speed discharge by operating multiple discharge positions simultaneously while the gondola moves continuously. This parallel operation eliminates the time loss associated with stopping and starting, enabling the outlet to clock out products faster and increase overall productivity.
Solution Approach 2:
The patent transitions from sequential discharge (one position at a time) to parallel discharge (multiple positions simultaneously) by adding the dimension of spatial distribution along the outfeed conveyor. This dimensional expansion allows multiple discharge operations to occur at the same time, dramatically increasing run-out capacity.
3Device complexity
If a single pusher discharges products sequentially from each tray, then simplicity is maintained, but the number of run-out cycles is limited
Solution Approach 1:
The discharge function is segmented across multiple discharge positions on the outfeed conveyor. Each position can independently receive products from different trays simultaneously, transforming a single-point sequential discharge into a multi-point parallel discharge system, thereby increasing cycle frequency without proportionally increasing mechanical complexity.
Solution Approach 2:
The outfeed conveyor is designed with multi-functionality, serving both as a transport belt and as a multi-position discharge station. Each position on the conveyor can function as a discharge point, allowing the same structural element to perform multiple discharge operations simultaneously, increasing productivity without adding separate dedicated discharge mechanisms for each position.
Data Source
Figure 1
Figure 2a~2d
Figure 3a~3d
AI summary
The disclosed unloading mechanism is used for unloading products, which are located on product-carrying racks that are arranged in product-carrying gondolas (4) of a storage chain conveyor, onto discharge belt conveyors (6, 7, 12). In order to increase the unloading capacity, at least two vertically pivotable discharge conveyors are arranged on top of each other at the discharge end. In order to simultaneously unload a plurality of racks, the pushing mechanism (9) is accordingly provided with a plurality of pushing bars.