Medium Transport Roller Layout for Low-Rigidity Media Wrinkle Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing medium transport devices face issues with uneven transport force distribution leading to wrinkles and skewing, particularly with low-rigidity media like fabric, due to multiple rollers with misaligned orientations.
Innovation Solution
A medium transport device featuring a single main roller and multiple sub-rollers arranged at varying distances, with an intermediate section positioned downstream, and a wrinkle removal mechanism to flatten and suppress wrinkles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple rollers are used to constitute the transport section, then the device complexity is reduced and manufacturing cost is lowered, but the transport force distribution becomes uneven causing wrinkles and skew in low-rigidity media
Solution Approach 1:
The main roller is segmented into three functional sections (upstream end section, intermediate section, downstream end section) with different rotational speeds. This segmentation allows each section to independently control the transport force applied to the medium, ensuring uniform transport while maintaining the simplicity of using multiple rollers.
Solution Approach 2:
Different sections of the main roller are assigned different rotational speeds to create localized transport characteristics. The upstream section rotates faster to feed the medium, the intermediate section rotates at a different speed to prevent wrinkles, and the downstream section adjusts speed to maintain tension control. This local differentiation resolves the contradiction between simple multi-roller configuration and uniform transport precision.
2Device complexity
If the intermediate section of the main roller is disposed at an upstream position, then the transport force application is simplified, but wrinkles occur in low-rigidity media due to improper force distribution
Solution Approach 1:
The intermediate section is positioned downstream to preliminarily address potential wrinkle formation before the medium reaches the winding section. By placing the intermediate section downstream, the system proactively applies appropriate transport force to flatten and prevent wrinkles in low-rigidity media before they can develop into harmful defects.
Solution Approach 2:
The rotational speed parameter of the intermediate section is specifically optimized to differ from the end sections. This parameter change allows the intermediate section to apply a different transport force that is specifically suited for preventing wrinkles in low-rigidity media, resolving the contradiction between simple roller arrangement and wrinkle prevention.
3Manufacturing precision
If a single main roller is used with varying rotational speeds across sections, then transport uniformity is improved, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The main roller is designed with dynamic speed control across its different sections, allowing each section to rotate at independently adjustable speeds. This dynamic capability enables the system to adapt the transport force distribution to match the specific requirements of different media types, achieving high transport uniformity while managing complexity through intelligent control rather than mechanical complexity.
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
Effectively suppresses wrinkles and skewing in low-rigidity media by applying a force that spreads and flattens them, ensuring smooth transport and processing.
Implementation Method 1
a transport roller pair and a paper feed roller pair that constitute a transport section for transporting a medium such as cut paper or roll paper
Data Source
AI summary
A medium transport device 6 includes a feed out section 2 that feeds out a medium 3 that is wound in a roll shape, a main roller 8, formed of a single body that applies a feed force to the medium in the transport direction F, a plurality of sub rollers 9 arranged at a distance D from each other along the longitudinal direction of the main roller8, wherein the sub roller 9 that rotates while nipping the medium with the pair with the main roller 8. the intermediate section 17 in the longitudinal direction of the main roller 8 is disposed at a downstream position in the transport direction F with respect to the end sections 23 and 24.