Roll Holding Apparatus Axial Positioning for Mounting
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Solution Overview
Problem
Existing roll holding apparatuses face a trade-off between holding force and operability, where shorter protruding lengths of holding members result in weak holding force and longer lengths impair operability during mounting of print-receiving paper rolls.
Innovation Solution
A roll holding apparatus with a pair of facing holding members supported by an advancing/retracting mechanism, allowing the tip end portions to switch between three states: protruding inward, outward, and intermediate positions, enabling secure holding without compromising operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the protruding length of the holding members is set shorter, then the operability upon mounting the print-receiving paper roll is improved, but the holding force weakens
Solution Approach 1:
The holding members are designed to be movable along the axial direction, transitioning between a first position (protruding inward) and a second position (retracted or protruding outward). This dynamic adjustment allows the system to optimize between holding force and mounting operability: during mounting, members are retracted to facilitate easy installation, while during operation, they protrude inward to provide strong holding force.
2Force
If the protruding length of the holding members is set longer, then the holding force is improved, but the operability upon mounting the print-receiving paper roll is impaired
Solution Approach 1:
The holding members are designed to be movable along the axial direction, transitioning between a first position (protruding inward) and a second position (retracted or protruding outward). This dynamic adjustment allows the system to optimize between holding force and mounting operability: during mounting, members are retracted to facilitate easy installation, while during operation, they protrude inward to provide strong holding force.
Solution Approach 2:
The holding members are positioned in the second position (retracted or protruding outward) before mounting begins, preparing the system for easy installation. This preliminary positioning ensures that the mounting operation can proceed smoothly without interference from the holding members, and the transition to the first position occurs automatically or manually after mounting is complete.
Data Source
AI summary
A roll holding apparatus includes a pair of holding members and an advancing/retracting support device. The pair of holding members is configured to be inserted into an inner periphery of a print-receiving paper roll. The pair of holding members is configured to rotatably support the print-receiving paper roll. The advancing/retracting support device is configured to support the holding member to switch an advancing/retracting state of the holding member into a first state, second state, or a third state. A tip end portion of the holding member protrudes to a first position in the first state. The tip end portion lies inward along an axial direction of the print-receiving paper roll than the first position in the second state. The tip end portion lies outward along the axial direction from the first position in the third state.