Recording-Medium Feeding Device Torque Limiter and Suppressing Member
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Solution Overview
Problem
Existing recording-medium feeding devices face issues with multi-feeding due to receding movement of recording media caused by reverse rotation of the separating mechanism, leading to incorrect delivery and processing of sheets.
Innovation Solution
A recording-medium feeding device is equipped with a separating mechanism that includes a driving member, a separating member with a torque limiter, and a suppressing member. The torque limiter inhibits rotation when a lower torque is applied, preventing receding movement of recording media, and the suppressing member prevents reverse rotation-induced receding by applying pressure to the recording media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the separating mechanism is equipped with a torque limiter to allow separating member rotation, then the separating mechanism can deliver recording media, but reverse rotation occurs when driving stops causing multi-feeding
Solution Approach 1:
The suppressing member applies preliminary counter-action to prevent reverse rotation of the separating member. When the driving member stops, the suppressing member maintains contact with the recording media to counteract the reverse rotational force, thereby preventing multi-feeding and maintaining feeding accuracy.
Solution Approach 2:
The suppressing member acts as an intermediary element between the separating member and the recording media. It mediates the interaction by applying controlled pressure to prevent reverse rotation while allowing normal separating operation during forward rotation, thus resolving the contradiction between delivery capability and feeding accuracy.
2Ease of operation
If the separating member rotates freely to separate recording media, then one-by-one separation is achieved, but receding movement occurs causing incorrect sequence
Solution Approach 1:
The suppressing member applies preliminary counter-action to prevent receding movement of recording media. By maintaining continuous contact and applying appropriate pressure, it counteracts the receding force generated during separating member rotation, ensuring accurate delivery sequence while preserving the separating function.
Solution Approach 2:
The system dynamically changes the contact pressure parameter of the suppressing member. During separating member rotation, the suppressing member applies sufficient pressure to prevent receding movement, while allowing free rotation for separation. This parameter adjustment resolves the contradiction between ease of separating operation and delivery sequence accuracy.
3Productivity
If the torque limiter allows rotation under low torque, then separating member can rotate for separation, but reverse rotation causes receding movement
Solution Approach 1:
The suppressing member serves as an intermediary that stabilizes the interaction between the torque limiter and recording media. It ensures that when the torque limiter allows rotation for separating operations, the recording media do not experience unwanted receding movement, thus maintaining reliable positioning while preserving separating functionality.
Solution Approach 2:
The suppressing member adjusts the contact pressure parameter to match the torque limiter's operational characteristics. By applying appropriate pressure during low-torque rotation phases, it prevents receding movement while allowing necessary rotation for separation, resolving the contradiction between separating operation productivity and recording medium positioning reliability.
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 effectively minimizes multi-feeding by ensuring accurate delivery and processing of recording media, as the suppressing member prevents receding movement, maintaining the correct sequence and reducing errors in feeding operations.
Implementation Method 1
When a rotational torque smaller than a predetermined rotational torque is applied to the torque limiter, the torque limiter repels a load of the rotational torque so as to inhibit rotation of the separating member
Implementation Method 2
The suppressing member suppresses receding movement of the recording media caused by reverse rotation of the separating member when the driving member of the separating mechanism stops
Data Source
AI summary
A recording-medium feeding device includes a container, a separating mechanism, and a suppressing member. The container accommodates recording media. The separating mechanism includes a driving member, a separating member, and a torque limiter. The driving member comes into contact with and delivers an uppermost recording medium. The separating member separates the recording media one-by-one. When a rotational torque smaller than a predetermined rotational torque is applied to the torque limiter, the torque limiter repels a load of the rotational torque to inhibit rotation of the separating member. When a rotational torque larger than or equal to the predetermined rotational torque is applied to the torque limiter, the torque limiter allows the separating member to be rotationally driven in accordance with the load. The suppressing member suppresses receding movement of the recording media caused by reverse rotation of the separating member when the driving member stops.