Printing Apparatus Roll Support with Automatic Width Adjustment
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Solution Overview
Problem
The existing roll-sheet support devices for printing apparatuses require manual bending of the guide limiter to accommodate rolls of varying diameters, complicating the operation of positioning the roll sheet.
Innovation Solution
A printing apparatus with a movable supporter and an engaging member that automatically adjusts the distance between supporters to accommodate rolls of different diameters, using a lock mechanism and urging members to facilitate easy operation and secure positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the guide limiter is made fixed to simplify the structure, then the device complexity is reduced, but the ease of operation deteriorates because manual bending is required for different roll diameters
Solution Approach 1:
The guide limiter is designed with movable portions that can automatically adjust their position based on the roll diameter. The movable supporter moves in the widthwise direction, and the engaging member transitions between engaged and separated positions, enabling the guide limiter to adapt dynamically to different roll sizes without manual intervention.
Solution Approach 2:
The system uses urging members (springs) to automatically return the movable supporter and engaging member to their proper positions after the cover is closed. The roll itself pushes the guide limiter into the correct position, eliminating the need for manual bending or adjustment by the user.
2Adaptability or versatility
If the guide limiter is made movable to accommodate different roll diameters, then the adaptability is improved, but the device complexity increases due to additional moving parts and mechanisms
Solution Approach 1:
The guide limiter incorporates movable portions that can automatically adjust their position based on the roll diameter. The movable supporter moves in the widthwise direction, and the engaging member transitions between engaged and separated positions, enabling the guide limiter to adapt dynamically to different roll sizes without manual intervention.
Solution Approach 2:
The engaging member acts as an intermediary between the cover and the movable supporter. When the cover is closed, the engaging member is pushed into the separated position, which indirectly moves the movable supporter to accommodate the roll. This intermediary mechanism simplifies the overall control structure.
3Ease of manufacture
If manual bending of the guide limiter is required, then the manufacturing precision can be maintained with simpler components, but the ease of operation deteriorates due to complicated setting procedures
Solution Approach 1:
The system uses urging members (springs) to automatically return the movable supporter and engaging member to their proper positions after the cover is closed. The roll itself pushes the guide limiter into the correct position, eliminating the need for manual bending or adjustment by the user.
Solution Approach 2:
The urging members are pre-configured to automatically position the movable supporter and engaging member in their correct positions when the cover is closed. This preliminary positioning action eliminates the need for manual adjustment during the roll setting process.
4Reliability
If the engaging member is always engaged to prevent supporter movement, then the reliability of roll positioning is improved, but the ease of operation deteriorates because the supporters cannot be adjusted for different roll sizes
Solution Approach 1:
The engaging member is designed to dynamically transition between engaged and separated positions based on the cover state. When the cover is open, the engaging member is separated, allowing the movable supporter to be adjusted. When the cover is closed, the engaging member becomes engaged, locking the supporter in place for reliable operation.
Solution Approach 2:
The engaging member periodically transitions between engaged and separated states corresponding to the cover opening and closing cycles. This periodic engagement allows adjustment during setup (cover open) and secures positioning during operation (cover closed).
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
Enables easy and secure positioning of roll sheets without manual adjustment, preventing skewing and simplifying the operation of placing rolls between supporters, thereby improving user convenience and operational efficiency.
Implementation Method 1
a first urging member configured to urge the movable supporter in an approach direction of the widthwise direction
Implementation Method 2
a second urging member configured to urge the engaging member from the separated position toward the engaged position
Data Source
AI summary
A printing apparatus includes: a main body; a cover; a pair of supporters including a movable supporter; a first urging member configured to urge the movable supporter in an approach direction; an engaging member movable between a separated position and an engaged position; and a second urging member configured to urge the engaging member toward the engaged position. When the cover is in an open state, the engaging member is located at the engaged position by an urging force of the second urging member so as to inhibit movement of the movable supporter in the approach direction. When the cover is in a closed state, the engaging member is located at the separated position against the urging force of the second urging member by contact of the cover with the engaging member so as not to inhibit the movement of the movable supporter in the approach direction.