Roll Core Adapter Holding for Multi-Diameter Substrate Switching
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Solution Overview
Problem
Existing roll substrate holding devices face issues with insufficient strength and general-purpose properties when handling different winding core diameters, leading to compatibility problems and difficulty in switching substrates.
Innovation Solution
A roll substrate holding device that uses a holding member and a conversion adapter, where the holding member contacts the winding core directly and the adapter is mounted on larger cores, ensuring sufficient strength and compatibility through surface or line contact, with a flange to prevent insertion and a restricting member to facilitate easy removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a locking claw is used to secure the adapter to the winding core, then the adapter strength is improved, but the ease of switching roll substrate is reduced and the adapter area becomes larger
Solution Approach 1:
The patent replaces the mechanical locking claw system with a friction-based holding mechanism. The holding member directly contacts the inner peripheral surface of the winding core through surface or line contact, using friction force to secure the adapter without requiring additional locking components. This substitution eliminates the need for locking holes and claws, thereby maintaining adapter strength while improving ease of switching and reducing adapter area.
2Adaptability or versatility
If the adapter is designed to fit different winding core diameters, then the general-purpose properties are improved, but the adapter strength becomes insufficient for large outer diameters or high transport speeds
Solution Approach 1:
The patent applies local quality by concentrating the holding force at specific contact regions between the holding member and the inner peripheral surface of the winding core. Through surface or line contact, the force is distributed optimally at the contact interface, providing sufficient strength for large outer diameters and high transport speeds while maintaining the adapter's ability to fit different winding core diameters through the conversion adapter design.
3Strength
If a shaft is used to hold the winding core, then the holding strength is sufficient, but the compatibility with different winding core inner diameters is reduced
Solution Approach 1:
The patent implements universality through the conversion adapter design, which enables a single holding member to accommodate multiple winding core inner diameters. The conversion adapter acts as an intermediary component that interfaces between the fixed holding member and variable winding core sizes, allowing the same holding mechanism to function universally across different core dimensions while maintaining sufficient holding strength through direct surface or line contact.
Data Source
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AI summary
Provided are a roll substrate holding device, a roll substrate holding method, and a printing apparatus that improve general-purpose properties of a winding core and that hold a roll substrate with sufficient strength. A roll substrate holding device that holds a roll substrate wound around a winding core without using a shaft includes: a holding member that is inserted into an opening of a first winding core having a first inner diameter and that comes into contact with the first winding core to rotatably hold the first winding core; and a conversion adapter that is mounted in an opening of a second winding core having a second inner diameter larger than the first inner diameter, in which the holding member is inserted into an opening of the conversion adapter that is mounted in advance on the second winding core, and comes into surface contact or line contact with an inner peripheral surface of the conversion adapter having the first inner diameter to rotatably hold the second winding core.