Counter-ejector Table Dynamics for Corrugated Paperboard Transfer
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Solution Overview
Problem
Counter-ejectors face inefficiencies in transferring batches of corrugated paperboard sheets due to longer conveyance-directional sizes, leading to increased transfer times and delayed processing of subsequent batches.
Innovation Solution
A counter-ejector design that includes a table capable of forward-backward displacement parallel to the feeding-out direction, with a backward restriction member and a control device managing the table's upward-downward and displacement movements to shorten transfer times by displacing the table backward during transfer and forward during upward movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the conveyance-directional size of corrugated paperboard sheets is increased, then the weight per sheet increases, but the transfer time from table to feeding-out conveyer increases significantly
Solution Approach 1:
The table is made movable in the conveyance direction (forward-backward movement) rather than being fixed. This allows the table to be displaced backward during batch transfer, effectively reducing the relative transfer distance and time, thereby resolving the time loss issue caused by processing heavier, longer sheets
2Quantity of substance
If the per-batch number of corrugated paperboard sheets is reduced for long-size sheets, then the stacking time is shortened, but the transfer time becomes the bottleneck
Solution Approach 1:
The table's position is made dynamic rather than fixed. During batch transfer, the table displaces backward in the conveyance direction, which reduces the effective transfer distance. This dynamic adjustment allows faster transfer of batches even when fewer long-size sheets are stacked per batch, maintaining overall productivity
3Device complexity
If the table remains stationary during batch transfer, then the structure is simple, but the transfer time is excessively long for long-size sheets
Solution Approach 1:
Instead of moving the batch forward relative to a fixed table, the table itself is moved backward during the transfer process. This reverse movement approach significantly reduces the relative transfer distance, cutting transfer time without requiring complex batch handling mechanisms
Solution Approach 2:
The table's movement capability is extended from only vertical (upward-downward) to include horizontal (forward-backward) movement in the conveyance direction. This additional degree of freedom allows the table to optimize its position during transfer, reducing transfer time while maintaining structural simplicity
Data Source
AI summary
A counter-ejector comprises: an elevator including a table displaceable in a forward-backward direction parallel to a feeding-out direction; a backward restriction member for restricting a situation where backward edges of corrugated paperboard sheets in a batch are displaced in a direction opposite to the feeding-out direction; table upward-downward movement drive device; a table displacement drive device; and a control device. The control device executes a table downward movement control processing such that the table is displaced backwardly in at least part of a time period when the table is moved downwardly from the hopper part to a table stop position and a time period when the table is stopped at the table stop position, and a table upward movement control processing such that the table is displaced forwardly in a time period when the table is moved upwardly from the table stop position to the hopper part.