Adjustable Torque Limiter for Medium Separation Roller
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing medium feeding apparatuses face challenges in appropriately separating various types of media, such as thin paper and high-friction paper, due to uniform separation resistance settings, which can lead to damage or non-feeding issues.
Innovation Solution
A medium feeding apparatus with a power transmission mechanism that includes a torque limiter and a load changing unit, allowing for adjustable pressing load, rotational speed, and limit torque settings based on the type of medium, enabling selective separation modes to accommodate different media types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform separation resistance is applied to all media types, then the separation structure remains simple, but thin paper and waste paper are greatly damaged
Solution Approach 1:
The patent applies dynamics by making the separation resistance adjustable rather than fixed. The pressing load of the separation roller against the feeding roller can be varied based on medium type, allowing the system to adapt its separation force dynamically. This resolves the contradiction by enabling both simple structure (when uniform low resistance is used) and damage-free separation (when adjusted resistance is applied to specific media types).
Solution Approach 2:
The patent changes the parameter of separation resistance by allowing adjustment of the pressing load between the separation roller and feeding roller. Different pressing loads can be applied depending on the medium type (thin paper, waste paper, high-friction paper), thereby preventing damage to delicate media while maintaining effective separation for other types.
2Reliability
If higher separation resistance is applied to ensure proper separation, then separation effectiveness improves, but thin paper and waste paper are greatly damaged
Solution Approach 1:
The patent resolves this contradiction by enabling parameter changes in separation resistance based on medium type. The pressing load can be increased for media requiring strong separation forces and decreased for thin or delicate media, thereby maintaining high separation effectiveness across all medium types without causing damage.
3Adaptability or versatility
If adjustable pressing load and limit torque settings are implemented, then separation performance for various media types improves, but device complexity increases
Solution Approach 1:
The patent applies dynamics by implementing adjustable pressing load through a load changing unit and variable limit torque through a torque limiter with adjustable settings. These dynamic adjustments enable the system to adapt to different medium types (thin paper, waste paper, high-friction paper) while maintaining a relatively compact power transmission mechanism structure.
4Ease of operation
If uniform separation resistance is used, then the control system remains simple, but separation may not be properly performed according to medium type
Solution Approach 1:
The patent resolves this contradiction by enabling parameter changes in separation resistance based on medium type. The pressing load can be increased for media requiring strong separation forces and decreased for thin or delicate media, thereby maintaining high separation effectiveness across all medium types without causing damage.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A medium feeding apparatus includes a feeding roller, a separation roller which nips a medium between the separation roller and the feeding roller to separate the medium and to which a driving torque is applied by a driving source in a second rotation direction that is opposite to a first rotation direction in which the medium is fed to a downstream side, and a torque limiter that causes the separation roller to idle in the first rotation direction when a rotational torque applied to the separation roller in the first rotation direction exceeds a limit torque that is a predetermined upper torque limit, in which separation setting including a pressing load of the separation roller, a rotational speed of the separation roller, and the limit torque is changeable according to conditions during feeding.