Roll Sheet Feeding Apparatus with Directional Rotation Member
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Solution Overview
Problem
Existing sheet feeding techniques struggle to reliably introduce the leading edge of a roll sheet into a conveyance path, especially when the leading edge is difficult to separate from the roll by its own weight.
Innovation Solution
A feeding apparatus with a roll support unit, a drive unit for rotating the roll sheet, an abutment portion, and a rotation member that abuts the roll sheet's outer peripheral surface, allowing the leading edge to be introduced into the conveyance path by rotating the roll sheet in specific directions while the rotation member follows or resists rotation accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the leading edge is conveyed into the conveyance path from a direction where it is difficult to separate by its own weight, then the automation of sheet feeding is improved, but the reliability of introducing the leading edge into the conveyance path deteriorates
Solution Approach 1:
The patent introduces a rotation member as an intermediary component between the roll sheet and the conveyance path. This rotation member temporarily holds and guides the leading edge of the sheet, enabling reliable introduction into the conveyance path even when the sheet cannot separate by its own weight. The rotation member acts as a mediator that facilitates the transfer of the sheet from the roll to the conveyance system.
Solution Approach 2:
The system performs preliminary actions by detecting the leading edge position in advance and preparing the rotation member to receive and guide it. The control unit monitors the rotation member's position and the roll sheet's rotation state beforehand, ensuring the leading edge is properly positioned and guided into the conveyance path before actual conveyance begins.
2Reliability
If a rotation member that follows roll sheet rotation is added to the apparatus, then the reliability of sheet feeding is improved, but the device complexity increases
Solution Approach 1:
The rotation member is designed to perform multiple functions: it guides the leading edge of the sheet, temporarily stores it, and facilitates its introduction into the conveyance path. By making this single component multi-functional, the patent avoids adding multiple separate mechanisms, thereby limiting the increase in device complexity while still improving reliability.
Solution Approach 2:
The rotation member is configured to automatically follow the rotation of the roll sheet and adaptively guide the leading edge without requiring additional active control mechanisms. The passive design allows the rotation member to self-adjust based on the roll sheet's rotation, reducing the need for complex control systems while maintaining reliable sheet feeding.
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
This solution ensures reliable and automatic introduction of the leading edge into the conveyance path, improving the feeding process by creating a slack that allows the sheet to be fed smoothly into the path, regardless of the roll's winding diameter.
Implementation Method 1
a rotation member configured to abut against the outer peripheral surface at a second position different from the first position, wherein the drive unit rotates the roll sheet in the first rotation direction to introduce, into the conveyance path, a leading edge of the sheet having passed between the first position and the second position, the rotation member at the second position does not rotate with the roll sheet when the roll sheet is rotated in the first rotation direction, and rotates with the roll sheet when the roll sheet is rotated in the second rotation direction
Data Source
AI summary
A feeding apparatus includes a roll support unit configured to rotatably support a roll sheet which is a sheet wound into a roll form, a drive unit configured to rotate the roll sheet in a first rotation direction for feeding the sheet into a conveyance path and a second rotation direction, an abutment portion provided so as to be capable of abutting against an outer peripheral surface of the roll sheet at a first position, and a rotation member configured to abut against the outer peripheral surface at a second position. The rotation member at the second position does not rotate with the roll sheet when the roll sheet is rotated in the first rotation direction, and rotates with the roll sheet when the roll sheet is rotated in the second rotation direction.