Press Roller Spring Frame Elastic Tensioning
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Solution Overview
Problem
Current solutions for preventing backlash and 'birdnesting' in spooled materials are complex and costly, often requiring multiple precision metal components and both right-handed and left-handed coil springs.
Innovation Solution
A press roller spring frame with an A-frame shape, where opposing sections form an arcuate connection, allowing elastic displacement to maintain material tension and prevent tangling, using a unitary piece of sheet metal with a roller that rotates about an orthogonal axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fabricated frames with multiple precision metal pieces and coil springs are used to prevent backlash, then backlash prevention effectiveness is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the frame structure and spring element into a single integrated C-shaped component. The spring element is formed as an integral part of the frame, eliminating the need for separate precision metal pieces and multiple coil springs. This merging maintains backlash prevention effectiveness while significantly reducing device complexity and manufacturing cost.
Solution Approach 2:
The C-shaped frame with integrated spring serves multiple functions simultaneously: it provides structural support, maintains tension on the wrap material, prevents backlash, and guides the material onto the spool. This multi-functionality replaces the need for multiple specialized components in conventional designs.
2Strength
If multiple precision metal pieces are welded together to create anti-backlash frames, then structural strength is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The frame is manufactured as a single C-shaped piece with an integrated spring element, eliminating the need for welding multiple precision metal pieces together. This single-piece construction maintains structural strength while dramatically simplifying manufacturing processes and reducing production cost.
Solution Approach 2:
The spring element's elasticity and the C-shaped frame's geometry are optimized to provide the necessary structural strength and tensioning force. By carefully controlling the physical parameters of the single-piece structure, the patent achieves equivalent or superior strength to multi-piece welded frames while improving ease of manufacture.
3Reliability
If both right-handed and left-handed coil springs are inserted onto fabricated frames, then backlash prevention in both directions is improved, but device complexity increases
Solution Approach 1:
The patent replaces multiple separate coil springs (right-handed and left-handed) with a single integrated spring element formed as part of the C-shaped frame. This unified spring configuration provides bidirectional backlash prevention through its elastic deformation capabilities, eliminating the complexity of inserting and configuring multiple specialized springs.
Solution Approach 2:
The integrated spring element automatically adjusts its deformation to provide tension in both directions as needed. The spring's elastic properties enable it to self-regulate and provide appropriate restoring force regardless of the direction of spool rotation, eliminating the need for manually configured right-handed and left-handed springs.
4Manufacturing precision
If tension is applied to material to prevent birdnesting, then material wrapping quality is improved, but risk of material damage increases
Solution Approach 1:
The spring element provides dynamic, adaptive tension to the wrap material. As the spool rotates and material is wound, the spring automatically adjusts its force to maintain appropriate tension without exceeding material strength limits. This dynamic tensioning improves wrapping quality while minimizing the risk of material damage compared to fixed rigid tensioning systems.
Solution Approach 2:
The elastic spring element acts as a cushion that absorbs and moderates tension forces before they are transmitted to the material. This beforehand cushioning prevents sudden or excessive tension spikes that could damage the material, while still maintaining sufficient tension to prevent birdnesting and ensure proper wrapping quality.
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
The solution provides a simpler, cost-effective anti-backlash configuration that effectively prevents material tangling and 'birdnesting' by maintaining material tension and stability during wrapping, even as the number of layers increases.
Implementation Method 1
a first section (14) of the frame member (12) between the second section (16) and the third section (18) configured to elastically deform under an applied force
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A press roller spring frame (10) is provided. The spring frame (10) includes a frame body (12) having a first section (14) having an arcuate shape, a second section (16) extending from the first section (14) and having a substantially planar shape, a third section (18) extending from the first section (14) and having a substantially planar shape. The second and third sections are configured to oppose one another with the first section (14) therebetween. The spring frame (10) further includes a roller (30) operatively coupled to the third section (18) and configured to rotate about an axis (34). A compressive force may be applied to the roller (30) to displace the third section (18) closer to the second section (16), whereby the arcuate shape of the first member (14) is compressed. The compression causes the first member (14) to produce a spring force that resists the compressive force applied against the roller (30) to keep the roller (30) against the object applying the compressive force.