Sheet Transport Roller Separation for Lightweight Door Operation
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Solution Overview
Problem
Existing sheet transport devices face complications due to mechanisms on the door side becoming intricate and the door becoming heavy, making it difficult to open and close.
Innovation Solution
A medium transport device with a first roller, a second roller, a first rotation shaft, a displacement mechanism, and a door that rotates around a second rotation shaft, where the door includes an acting section that contacts an action receiving section to displace the first rotation shaft between nipping and separating positions, utilizing a cam structure for automatic separation and a slide member for miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the door includes a mechanism to separate rollers when opened, then the rollers can be separated, but the door mechanism becomes complicated and heavy
Solution Approach 1:
The patent extracts the roller separation function from the door mechanism itself and transfers it to the displacement mechanism. The door simply opens and closes without containing complex separation mechanisms. The separation function is achieved by the displacement mechanism moving the first roller away from the second roller when the door opens, thereby eliminating the need for complicated door-side mechanisms.
Solution Approach 2:
The displacement mechanism acts as an intermediary between the door opening action and the roller separation. When the door opens, the displacement mechanism is activated to move the first roller, thereby achieving separation without requiring the door itself to contain complex mechanisms. This intermediary approach simplifies the door while achieving the desired separation function.
2Ease of operation
If the door includes a mechanism to separate rollers when opened, then the rollers can be separated, but the door weight increases making it difficult to open and close
Solution Approach 1:
The patent extracts the roller separation function from the door mechanism itself and transfers it to the displacement mechanism. The door simply opens and closes without containing complex separation mechanisms. The separation function is achieved by the displacement mechanism moving the first roller away from the second roller when the door opens, thereby eliminating the need for complicated door-side mechanisms.
Solution Approach 2:
The displacement mechanism automatically performs the roller separation function when the door opens, without requiring additional heavy components in the door. The system uses the door opening motion itself to trigger the displacement mechanism, which then automatically moves the first roller to achieve separation, making the door lighter and easier to operate.
3Device complexity
If the first roller is held at a fixed position, then the structure is simple, but the roller cannot be separated from the second roller when the door opens
Solution Approach 1:
The patent introduces dynamic positioning of the first roller through the displacement mechanism. Instead of fixing the first roller at a static position, the displacement mechanism allows it to move between a first position (when the door is closed) and a second position (when the door opens). This dynamic capability enables roller separation when needed while maintaining structural simplicity through the use of a straightforward displacement mechanism.
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 simplifies the door mechanism, reduces weight, and ensures easy opening and closing, while achieving automatic separation of rollers with a compact design and stable movement.
Implementation Method 1
utilizing a cam structure for automatic separation
Implementation Method 2
a slide member for miniaturization
Data Source
AI summary
A medium transport device includes a first roller 9, a second roller 11, a first rotation shaft 13 supporting the first roller, a displacement mechanism 15 configured to displace the first rotation shaft to a first position P1 where the first roller and the second roller are configured to nip the medium and to a second position P2 where both 9 and 11 are separated from each other, and a door 7 configured to rotate into an opened position and into a closed position around an axis that intersects the first rotation, wherein the door includes an acting section 17, the displacement mechanism includes an action receiving section 19, and when the door 7 rotates to the closed position and the acting section 17 no longer pushes the action receiving section 19, the displacement mechanism displaces the first rotation shaft 13 from the first position to the second position.