Profiled Strip Sheet Guide for Vibration Control
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Solution Overview
Problem
Existing sheet guiding devices for sheet feeders face issues with vibration and sagging due to low inherent rigidity, which affects sheet conveyance, especially in large-format machines, and protrusion into downstream machines when handling smaller formats.
Innovation Solution
A sheet guiding device with strip-shaped bodies that can be wound up or unwound for length adjustment, featuring a plastic deformation to increase bending resistance, allowing high rigidity with low tensioning forces and minimizing edge damage to sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bands are used to guide sheets, then sheet guiding is achieved, but the bands vibrate and have low inherent rigidity causing sagging
Solution Approach 1:
The patent changes the physical parameters of the sheet guiding element by plastic deformation of the strip-shaped body to increase its moment of resistance to bending. This transforms the material properties to achieve higher inherent rigidity without requiring additional tensioning forces, directly resolving the vibration and sagging issues.
Solution Approach 2:
The patent uses a composite structure combining a strip-shaped body made of steel or plastic with a specific profile cross-section. The profiled design creates a composite-like effect where the geometric shape enhances the material properties, achieving high rigidity with low weight and minimal tensioning requirements.
2Length of moving object
If tapes are made longer for large formats, then coverage is improved, but sagging increases due to low inherent rigidity
Solution Approach 1:
The patent applies plastic deformation to the strip-shaped body to fundamentally change its structural parameters. The profiled cross-section increases the moment of resistance to bending, allowing the tapes to be made longer for large formats while maintaining high inherent rigidity and preventing sagging without requiring complex compensation measures.
3Stability of the object's composition
If high clamping forces are applied to prevent sagging, then sheet guiding stability is improved, but device complexity increases
Solution Approach 1:
The patent changes the inherent structural parameters of the sheet guiding elements through plastic deformation and profile design. This increases the moment of resistance to bending, providing sheet guiding stability without requiring high clamping forces or complex compensation measures, thereby simplifying the overall device.
4Adaptability or versatility
If sheet separator is moved for format adjustment, then adaptability is improved, but band vibration is exacerbated
Solution Approach 1:
The patent modifies the physical parameters of the bands through plastic deformation to increase their inherent rigidity and moment of resistance to bending. This reduces band vibration during format adjustment operations, allowing the sheet separator to be moved for adaptability without exacerbating vibration problems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a sheet guiding device with high inherent rigidity, reducing the need for high tensioning forces and preventing sheet damage, while allowing format adjustment without obstructing downstream operations.
Implementation Method 1
The strip-shaped bodies 20 are plastically deformed in such a way that when they change from the rolled-up state to a stretched position, they change to a profile cross-section that has an increased moment of resistance to a bending load.
Implementation Method 2
The winding rollers 21 are subjected to a rewinding force so that the tapes are wound and kept taut at all times.
Implementation Method 3
with blowing devices for building up an air cushion that supports sheet conveyance
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The sheet feeding device has a sheet separator (3), separating a sheet (1) and adjustable in and against sheet conveying direction (17) for format adjustment. Glass devices develop an air cushion, supporting the sheet conveying, and the device limits a sheet conveying level of the sheet and comprises individual sheet feeding elements. The sheet feeding elements comprise a strap-like body (20) and a winding roll (21) loaded by a rewinding force. The strap-like bodies have a formation increasing the resistive torque against bending.