Adjustable Downholder Fingers for Folding Machine Sheet Formats
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Solution Overview
Problem
Existing folding machines face challenges in adjusting downholders correctly to different sheet formats, leading to potential malfunctions, errors, and increased production downtime due to user inexperience and the need for manual adjustments.
Innovation Solution
A device with a multi-part downholder having adjustable fingers that can be easily positioned and adjusted to match the format of sheets, eliminating the need for manual exchanges and ensuring correct alignment without complex operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual adjustment of downholders is used, then the device can be adapted to different sheet formats, but the adjustment time increases and error risk increases due to user inexperience
Solution Approach 1:
The downholder finger is divided into multiple segments (first part, second part, third part) that can be independently positioned. This segmentation allows the finger length to be adjusted in discrete steps corresponding to different sheet formats, enabling quick adaptation without manual measurement and assembly.
Solution Approach 2:
Multiple finger lengths are pre-configured by providing several second parts with different lengths. The operator simply selects and installs the appropriate pre-configured part rather than manually adjusting during operation, eliminating adjustment time and error risk while maintaining adaptability.
2Adaptability or versatility
If manual adjustment of downholders is used, then the device can be adapted to different sheet formats, but the reliability decreases due to potential malfunctions and errors
Solution Approach 1:
The segmented finger structure with standardized connection interfaces ensures precise positioning and secure attachment. Each segment can be independently verified for correct installation, eliminating the reliability issues associated with manual adjustment while maintaining format adaptability.
Solution Approach 2:
The system enables the operator to independently select and install the correct finger length without requiring expertise or complex procedures. The self-service nature of the adjustment process eliminates human error while maintaining adaptability to different formats.
3Adaptability or versatility
If multiple downholder embodiments are provided for different formats, then adaptability to different sheet formats is improved, but the device complexity increases due to storage and management requirements
Solution Approach 1:
The downholder finger is segmented into standardized components (first part, second part, third part) where only the middle section varies in length. This segmentation reduces the number of distinct embodiments that must be managed compared to completely different downholders for each format, simplifying storage and selection.
Solution Approach 2:
The first and third parts serve universal functions across all formats, while only the second part needs variation. This multi-functionality approach allows a single base structure to accommodate multiple formats by simply changing one component, reducing overall device complexity while maintaining adaptability.
4Adaptability or versatility
If downholders are manually exchanged for different formats, then adaptability is improved, but the ease of operation decreases due to disassembly and reassembly requirements
Solution Approach 1:
The segmented finger structure with standardized interfaces allows for tool-free assembly and disassembly. The operator can quickly swap between different second parts without complex procedures, significantly improving ease of operation while maintaining adaptability to different formats.
Solution Approach 2:
The system transitions from static, fixed-length downholders to a dynamic configuration where the finger length can be easily changed. The modular design with standardized connections enables rapid reconfiguration without manual adjustment or specialized tools, improving operational ease.
Data Source
AI summary
A device for transporting sheets in a folding machine has a transport table with a transport direction for the sheets and at least one downholder for the sheets. The downholder is positionable onto the format of the sheets in the transport direction and the downholder has a multi-part finger. The multi-part finger has at least a first part and a second part, with the second part being movable relative to the first part, in order to adjust a length of the finger to the format of the sheets. The device allows for correctly adjusting formats at folding machines and/or respective transport tables in an advantageous manner. There is also described a folding machine with shingled sheet transport in industrial settings, in which the transport device is suitable used.