Rotatable Roller Alignment for Flat Blank Positioning
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Solution Overview
Problem
Existing devices for aligning flat blanks, particularly in printing and print finishing machines, face challenges in maintaining accurate positioning and alignment, especially when using roller conveyors, which are prone to misalignment and shifting during transport, especially over longer distances and varying speeds, and require costly adjustments to maintain proper alignment.
Innovation Solution
A device with rotatable rollers arranged in pairs with adjustable angular positions, supported by a structure with elastic mounting and a common actuating mechanism, allowing for precise alignment without shifting the underlying rollers, enabling correction of positional errors and alignment changes without adjusting the entire device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If roller conveyors are used to transport flat blanks, then the transport device can be simpler and quieter, but the flat blanks twist or shift during transport making positioning and alignment difficult
Solution Approach 1:
The patent introduces guide rollers as intermediary elements that mediate between the transport rollers and the flat blanks. These guide rollers are arranged at angles to the transport direction and provide lateral guidance, preventing the blanks from twisting or shifting while remaining on the roller conveyor system. This intermediary structure solves the alignment problem without requiring a complete change to the roller conveyor design.
Solution Approach 2:
The guide rollers are designed to be rotatable about vertical axes, allowing them to dynamically adjust to the position and orientation of the flat blanks during transport. This dynamic capability enables the rollers to self-correct minor misalignments and maintain proper blank positioning throughout the transport process, addressing the shifting problem adaptively.
2Manufacturing precision
If guide rollers are installed above each transport roller to prevent twisting, then alignment is improved, but the device complexity and operating noise increase enormously
Solution Approach 1:
The patent merges the function of transport and alignment into a single integrated roller structure. Each roller unit combines both transport capability (through rotation about horizontal axes) and alignment capability (through rotation about vertical axes), eliminating the need for separate guide roller assemblies above each transport roller. This consolidation reduces device complexity while maintaining alignment precision.
Solution Approach 2:
The guide rollers serve multiple functions: they provide lateral guidance to prevent twisting, maintain contact with the flat blanks during transport, and enable angular adjustment for alignment correction. This multi-functionality reduces the overall number of components needed in the transport device while achieving both transport and alignment objectives.
3Manufacturing precision
If guide rollers are installed to correct alignment, then positioning is improved, but the operating noise increases significantly
Solution Approach 1:
The patent changes the operational parameters of the rollers by enabling rotation about vertical axes in addition to horizontal axes. This parameter change allows the rollers to smoothly guide and correct blank positioning through controlled rotation rather than through friction-based rubbing contact, significantly reducing operating noise while maintaining positioning accuracy.
4Manufacturing precision
If the transport device is adjusted to correct displaced blanks, then alignment is improved, but the entire device requires complex adjustments
Solution Approach 1:
The patent segments the alignment function into individual roller units, each capable of independent angular adjustment about its vertical axis. This segmentation allows localized alignment corrections at specific positions along the transport path without requiring adjustment of the entire transport device, greatly simplifying operation and maintenance.
Solution Approach 2:
The rollers are designed with dynamic adjustment capabilities, allowing operators to modify the angular position of individual rollers based on the specific alignment needs of the flat blanks. This dynamic adjustability enables precise alignment corrections without complex device-wide adjustments, improving ease of operation.
Data Source
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AI summary
The invention relates to an alignment device for aligning flat blanks, comprising a support structure (1) on which at least two rotatable rollers (2), each having a horizontal axis of rotation (21) and arranged one behind the other in pairs at equal distances from each other, are arranged so that their contact points lie on a horizontal plane on a straight line, their axes of rotation being aligned parallel to each other, and each roller being rotatable about a vertical axis of rotation passing through its contact point and being fixable at different angular positions.