Sheet Conveyer Flap Mechanism for Warped Printing Sheets
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Solution Overview
Problem
Conventional sheet conveyers face issues with smooth conveying of warped printing sheets, as the leading end may contact the roller conveyer and obstruct the flow, leading to inefficiencies in sheet handling.
Innovation Solution
A sheet conveyer design with interconnected curved and linear passages, featuring a flap mechanism that rotates to manage the passage connections, ensuring smooth conveyance by blocking or opening passages as needed to prevent sheet contact with guide rollers, thereby facilitating the smooth transfer of printing sheets between trays and the conveying roller pair.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a roller conveyer is provided between the connecting position and the conveying roller pair to enable smooth conveying from multiple sheet trays, then the conveying capability is improved, but when printing sheets are conveyed in a warped condition, the leading end contacts the roller conveyer and obstructs smooth conveying
Solution Approach 1:
The patent employs a movable flap mechanism that dynamically changes the configuration of the conveying passage. The flap can rotate between a first position (blocking the first conveying passage) and a second position (opening the first conveying passage), allowing the system to adapt its structure based on operational needs and prevent warped sheets from obstructing the roller conveyer
Solution Approach 2:
The conveying system is divided into separate controllable segments: the first conveying passage with the flap mechanism, the second conveying passage, and the roller conveyer. This segmentation allows independent control of each passage, enabling the flap to block or open specific passages to guide sheets smoothly without obstruction
2Adaptability or versatility
If multiple conveying passages are connected to allow sheets from multiple trays to reach the conveying roller pair, then the sheet handling capability is improved, but the complex passage connections may cause warped sheets to contact guide rollers and obstruct flow
Solution Approach 1:
The flap mechanism provides dynamic control over passage connectivity. By rotating between first and second positions, the flap dynamically establishes or blocks connections between conveying passages, enabling versatile multi-tray handling while maintaining a relatively simple passive structure that only becomes active when needed
Solution Approach 2:
The flap acts as an intermediary element between the first and second conveying passages. It mediates the connection by selectively blocking or opening the passage, allowing controlled interaction between different conveying paths without requiring complex active control mechanisms
Data Source
AI summary
A sheet conveyer has a casing defined with first and second conveying passages and respectively having first and second curved passages. The first and second curved passages curve in opposite directions. A flap rotatably provided to a second guide member constituting a curved outside part of the first curved passage. When the flap is at a first position, the flap blocks passage from a part of the first conveying passage to the connection position, while the second conveying passage is opened to the connection position. When the flap is at the second position, the first conveying passage is opened toward the connection position and a part of the second conveying passage is blocked with respect to the connection position. A guide surface constituting an upper surface of the first curved passage is closer to the third guide member than a guide roller when the flap is at the second position.