Sheet Supply Device Radial Pressing Roller Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sheet supply devices face challenges in reliably joining sheets due to insufficient force transmission from a lifting/lowering pressure roll, leading to bending of the rotation arm and inefficient joining of sheets.
Innovation Solution
A sheet supply device with a rotation member supported by a rotation shaft, featuring support shafts orthogonal to the rotation shaft and a joining mechanism with a pressing roller that moves radially to align its center with the rotation and support shafts' centers, ensuring accurate force transmission and sheet joining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the lifting/lowering pressure roll moves in a direction intersecting with the line connecting the rotation shaft and the center of the standby side roll, then the pressure roll can approach the standby side roll, but the rotation arm rotates around the rotation shaft and bends due to received force, resulting in insufficient force transmission
Solution Approach 1:
The patent positions the pressing roller's center on the straight line passing through the rotation shaft center and support shaft center. This geometric arrangement creates a counterbalancing effect where the pressing force is transmitted radially through the support shaft rather than creating a moment arm that would cause rotation arm bending. The force vector alignment compensates for the rotational instability issue.
Solution Approach 2:
The patent introduces asymmetric positioning of the pressing roller relative to the rotation arm structure. Instead of allowing free movement in any direction, the pressing roller is constrained to move along a specific radial path defined by the straight line through the rotation shaft and support shaft centers. This asymmetric constraint prevents the rotation arm from rotating while maintaining effective force transmission.
2Ease of operation
If the pressing roller is supported to move freely toward the standby side roll, then the joining operation can be performed, but the pressing roller's self-weight and received force cause the rotation arm to bend
Solution Approach 1:
The patent creates an equipotential condition by aligning the pressing roller's movement path with the radial direction from the rotation shaft. This geometric arrangement ensures that the pressing force acts along the same line as the support shaft, creating a force equilibrium that prevents bending moments. The system is designed so that the force application point and the support point are collinear with the rotation center, eliminating rotational stress on the rotation arm.
3Force
If the rotation arm is made more rigid to prevent bending, then force transmission improves, but the device complexity increases
Solution Approach 1:
The patent changes the geometric parameters of the pressing mechanism, specifically the position and movement path of the pressing roller. By repositioning the pressing roller's center on the straight line through the rotation shaft and support shaft centers, the system achieves effective force transmission without requiring increased structural rigidity. This parameter change transforms the problem from one requiring stronger materials or thicker sections to one solved by optimal geometric configuration.
Data Source
AI summary
Provided is a sheet supply device capable of reliably joining sheets by accurately transmitting force for joining the sheets. A joining mechanism includes a pressing roller that presses a sheet of a supply side roll against the outer peripheral surface of a standby side roll; and a moving unit that supports the pressing roller such that the pressing roller is configured to approach and move away from the standby side roll supported by a support shaft disposed at a splice position in the radial direction of the standby side roll. The moving unit supports the pressing roller such that the center of the pressing roller is movable on a straight line passing through the center of a rotation shaft and the center of the support shaft disposed at the splice position.