Sheet Stacker Layout for Staggered Corrugated Board Bundles
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Solution Overview
Problem
Existing sheet stacking devices for corrugated board sheets are cumbersome and expensive due to the need for strong actuators and complex mechanisms to achieve staggered bundle formation, particularly in forming stacks with staggered bundles.
Innovation Solution
A sheet stacker with a sheet conveyor arrangement that lifts its discharge end and a stop plate during stacking to accommodate growing stacks, using a reciprocating conveyor motion to form staggered bundles without horizontal movement of the entire platform, and a stop plate that withdraws to allow for easy removal of the stack to allow for easy removal of the stack in a manner similar to the said stack, using a reciprocating motion of the stack conveyor to form staggered bundles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the entire stacker platform is moved horizontally to achieve staggered bundles, then staggered bundle formation is achieved, but the device requires strong actuators and a particularly sturdy structure, increasing device complexity and cost
Solution Approach 1:
The invention divides the stacking function into two independent parts: the stacker platform remains stationary while only the sheet discharge end moves horizontally. This segmentation eliminates the need for strong actuators to move the entire platform, reducing device complexity while maintaining staggered bundle formation capability.
Solution Approach 2:
The invention changes the dimension of movement from horizontal displacement of the entire platform to vertical displacement of the sheet discharge end. The discharge end moves up and down to accommodate growing stacks, while horizontal positioning is achieved through a separate linear motion mechanism, simplifying the overall structure.
2Ease of operation
If the sheet discharge end is gradually lifted to accommodate growing stacks, then the stacking function is improved, but the conveyor arrangement becomes more complex
Solution Approach 1:
The invention adds vertical movement capability to the sheet discharge end, allowing it to rise and fall as stacks grow. This vertical dimension complements the horizontal linear motion, enabling the discharge end to accommodate growing stacks without requiring complex mechanisms to move the entire platform horizontally.
Solution Approach 2:
The sheet discharge end is designed with dynamic movement capabilities in both vertical and horizontal directions. The vertical motion accommodates growing stacks while the horizontal linear motion achieves precise positioning for staggered bundle formation, creating a flexible and adaptive stacking system.
3Productivity
If the stop plate is withdrawn to allow easy removal of the stack, then stack handling efficiency is improved, but the device structure becomes more complex
Solution Approach 1:
The stop plate is designed to be movable rather than fixed, allowing it to be withdrawn when stacks are complete and repositioned for the next stacking operation. This dynamic element simplifies stack removal while maintaining structural simplicity through a single degree of freedom motion.
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
The sheet stacker (1) comprises a sheet conveyor arrangement (3), configured for feeding a plurality of sheets (C) and having a sheet discharge end (17), and a stacking bay (5). In the stacking bay sheets (C) delivered by the sheet conveyor arrangement (3) are formed into stacks (S). A stack conveyor (19) is provided in the stacking bay (5) and is movable in a conveyor direction (fl9) parallel to a sheet feeding direction (F), according to which the sheets (F) are fed from the sheet discharge end (17) onto the stack conveyor (19). The sheet discharge end (17) is configured and controlled such that it is gradually lifted during sheet stacking, in order to accommodate a growing stack (S) of sheets (C) being formed on the stack conveyor (19). A stop plate (37) is positioned in the stacking bay (5) above the stack conveyor (19) and in front of the sheet discharge end (17) of the sheet conveyor arrangement (3). The stop plate (37) is configured and controlled to be gradually lifted from the stack conveyor (19) as the sheet stack (S) grows, to be withdrawn upon completion of the stack (S) thus allowing removal of the stack in an evacuation direction (fE) substantially parallel to the conveyor direction (fl9), and to be lowered towards the stack conveyor (19) again.