Dynamic Sheet Stopper for Corrugated Paperboard Stacking
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Solution Overview
Problem
The existing sheet stacking apparatuses for corrugated paperboard boxes face issues with frequent maintenance and degradation due to high impact forces, especially when transfer speeds increase, leading to damage and reduced effectiveness over time.
Innovation Solution
A sheet stacking apparatus with a positionally adjustable leading-edge regulating member and a movable sheet stopper, synchronized by a detection system to gradually reduce the speed of incoming corrugated paperboard sheets, minimizing contact force and extending the apparatus's operational lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a static front contact plate with spring and rubber components is used to absorb impact force, then the leading edge of the corrugated paperboard sheet is protected from damage, but the contact components degrade due to cyclic impact loads, requiring frequent maintenance
Solution Approach 1:
The patent applies the dynamics principle by making the sheet stopper movable rather than static. The sheet stopper reciprocates between a first position (retracted) and a second position (extended) to meet the moving corrugated paperboard sheet. This dynamic configuration allows the stopper to move with the sheet during contact, reducing impact force and preventing degradation of contact components while still protecting the leading edge of the sheet.
Solution Approach 2:
The patent uses the sheet stopper as an intermediary element between the leading-edge regulating member and the corrugated paperboard sheet. The sheet stopper transfers the regulating function while minimizing direct impact on both the regulating member and the sheet. By positioning and moving the stopper appropriately, it mediates the interaction to reduce harmful impact forces.
2Productivity
If the transfer speed of corrugated paperboard sheets is increased to improve productivity, then output increases, but impact force on contact components increases, accelerating degradation
Solution Approach 1:
The dynamic reciprocating motion of the sheet stopper allows it to adapt to different transfer speeds. By controlling the reciprocation timing and speed, the system can handle higher transfer speeds without proportionally increasing impact force, as the stopper moves with the sheet rather than remaining static and absorbing full impact energy.
Solution Approach 2:
The patent changes the parameter of the contact component from static to dynamic motion. The sheet stopper's reciprocating motion parameter allows it to adjust its position and velocity to match the incoming sheet, thereby controlling the contact force regardless of the sheet's transfer speed, and preventing accelerated degradation.
3Reliability
If a movable sheet stopper with reciprocating motion is used to reduce impact force, then maintenance interval is extended and sheet damage is reduced, but device complexity increases due to synchronization control requirements
Solution Approach 1:
The patent employs feedback control where the detection section monitors the position or passage of the corrugated paperboard sheet and provides information to the synchronization control device. This feedback loop allows the sheet stopper's reciprocating motion to be precisely synchronized with the sheet's arrival, ensuring optimal contact timing and position while managing the complexity through intelligent control rather than mechanical complexity.
Data Source
AI summary
Disclosed is a sheet stacking apparatus which includes: a leading-edge regulating member configured to be positionally adjustable depending on a length of a plurality of corrugated paperboard sheets; a sheet stopper installed in the leading-edge regulating member in such a manner as to be movable with respect to a contact surface of the leading-edge regulating member reciprocatingly between a first position and a second position, and contactable with a leading edge of the corrugated paperboard sheet to be stacked in the hopper section; a detection section disposed upstream of the hopper section, and configured to detect a passing of each of the corrugated paperboard sheets; and a synchronization control device configured to reciprocatingly move the sheet stopper according to a detection signal, in such a manner as to allow the leading edge of the corrugated paperboard sheet to come into contact with the sheet stopper.