Medium Supply Device Moving Roller Dynamics
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Solution Overview
Problem
Existing medium supply devices face operability issues when inserting large roll-type media, requiring excessive time and labor due to the need for curved medium insertion and limited contact surface area between the medium and support rollers.
Innovation Solution
A medium supply device with a spindle, support rollers, a moving roller that can apply load and move between contact and non-contact positions, and a moving mechanism to increase the contact surface area and facilitate direct medium insertion and transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the winding length of the medium on the support rollers is lengthened to improve transportability, then the contact surface area between the medium and support rollers increases, but the medium requires curved insertion which deteriorates operability and requires excessive time and labor
Solution Approach 1:
The patent applies the dynamics principle by making the moving roller movable between a contact position (where it contacts the medium to increase winding length and transportability) and a non-contact position (where it does not contact the medium, allowing easy insertion). This dynamic adjustment resolves the contradiction by allowing the system to optimize for either transportability or ease of operation depending on the operational phase
Solution Approach 2:
The patent applies preliminary action by positioning the moving roller in the non-contact position before medium insertion to facilitate easy loading, then transitioning it to the contact position after insertion to ensure proper transportability. This sequence of pre-positioning actions resolves the contradiction by preparing the system in advance for the specific operational requirement
Data Source
AI summary
Provided is a medium supply device including a spindle that supports a medium having a roll shape, a supplying portion that supplies the medium supported by the spindle toward outside, a plurality of support rollers that support the medium in positions between the spindle and the supplying portion, a moving roller that, in a contact position between the support rollers, is capable of coming into contact with a bridging medium extending across the support rollers in a state where a load is applied to the bridging medium and that is capable of moving from the contact position to a non-contact position of non-contact with the bridging medium, and a moving mechanism configured to move the moving roller from the contact position to the non-contact position.