Longitudinal Positioning Systems for Corrugated Stacking Access
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Solution Overview
Problem
Existing apparatus for stacking corrugated sheet material face challenges in safely and easily accessing all necessary parts for setup, recovery from jams, and maintenance, often requiring operators to climb or use pits due to high-speed operation and fragile material handling.
Innovation Solution
The apparatus includes a trim section for removing scrap, an incline conveyor for elevating material, and a stacking section with longitudinal positioning systems to create operator access spaces, allowing for safe and easy access without the need for climbing or pits, using overhead support and movable components like batch and lift forks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional stacking apparatus are designed for high-speed operation, then productivity is improved, but operator access to machine parts becomes difficult and unsafe
Solution Approach 1:
The patent applies the dynamics principle by making the conveyor system movable rather than fixed. The conveyor can be positioned at different locations along the stacking apparatus, allowing it to move out of the way to provide operator access to machine parts. This dynamic repositioning capability resolves the contradiction by enabling both high-speed operation (when conveyor is in position) and safe operator access (when conveyor is moved away).
Solution Approach 2:
The patent resolves the access problem by utilizing the longitudinal dimension of the machine. Instead of operators needing to climb on top or reach into confined spaces, the movable conveyor allows access from the side by moving along the longitudinal axis. This dimensional approach creates clearance space without compromising the high-speed stacking capability.
2Productivity
If traditional stacking apparatus are designed for high-speed operation, then productivity is improved, but the risk of damaging fragile blanks increases
Solution Approach 1:
The patent replaces traditional mechanical stacking mechanisms with an air blow system. Compressed air is used to direct blanks onto the conveyor and between stacking positions, eliminating mechanical contact that could damage fragile blanks. This substitution allows high-speed operation while protecting the integrity of the blanks through non-contact handling.
Solution Approach 2:
The patent utilizes pneumatic systems to handle the fragile blanks. Air streams are directed to propel and position blanks during the high-speed stacking process, providing gentle yet effective material handling that prevents damage while maintaining high productivity. The pneumatic approach replaces harsh mechanical forces with controllable air pressure and flow.
3Ease of operation
If traditional stacking apparatus require operators to climb or use pits, then access to machine parts is achieved, but safety and ease of maintenance deteriorate
Solution Approach 1:
The movable conveyor system dynamically repositions to create safe access clearance, eliminating the need for operators to climb or work in hazardous positions. The conveyor can be moved away from maintenance areas, providing safe ground-level access to all machine parts while maintaining operational capability when positioned for stacking.
Data Source
AI summary
An apparatus for stacking sheet material that may include a trim section and a stacking section, the stacking section being downstream the trim section for receiving the blanks of sheet material, forming bundles each having a plurality of blanks, and transferring the bundles downstream. The apparatus may further include a plurality of longitudinal positioning systems for independently longitudinally positioning a plurality of components in at least one of upstream or downstream directions so as to create an operator access space. In some embodiments, the apparatus may further include an incline conveyor section downstream the trim section and upstream the stacking section, and the trim section may have a takeaway conveyor for conveying the plurality of blanks of sheet material to the incline conveyor. In certain embodiments, the plurality of longitudinal positioning systems can individually longitudinally position at least two of the takeaway conveyor, the incline conveyor, or the stacking apparatus.