Paper Roll Chuck Structure for Eccentricity-Free Support

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The issue of paper roll damage and eccentric support during rotation in corrugated board manufacturing due to misalignment of the chuck's center with the paper roll's center, leading to potential breakage of the feeding web under centrifugal force.

Innovation Solution

A paper roll support device with movable support arms and chucks featuring a conical chuck body with guide grooves and movable support members, along with a movement unit and force-applying device to ensure proper alignment and contact with the paper roll, preventing damage and eccentric support.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the chuck is inserted into the paper roll with simple support members, then the device complexity is reduced, but the paper roll may be damaged due to misalignment and eccentric support

Engineering Contradiction:

Improvechuck structure complexityVSAvoidpaper roll support reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The chuck is divided into multiple support members (first support member and second support member) that can independently adjust their positions along the guide portions. This segmentation allows each support member to be positioned independently to achieve proper alignment with the paper roll center, preventing eccentric support and damage while maintaining a relatively simple overall structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The support members are designed to be movable along the guide portions of the chuck body, allowing dynamic adjustment of their positions. This mobility enables the support members to adapt to misalignment between the chuck center and paper roll center, ensuring proper alignment and preventing damage during rotation.

Inventive Principle:

Principle #15Dynamics

2Device complexity

If the support members are fixed in position, then the device complexity is reduced, but the paper roll cannot be properly aligned when centers deviate

Engineering Contradiction:

Improvesupport member adjustment mechanismVSAvoidpaper roll alignment precision

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The positions of the support members along the guide portions can be adjusted to change the geometric parameters of the chuck assembly. By modifying the positions of the support members, the system compensates for deviations in center alignment between the chuck and paper roll, achieving precise alignment without complex adjustment mechanisms.

Inventive Principle:

Principle #35Parameter changes

3Manufacturing precision

If the chuck body is conical with guide portions, then the alignment precision is improved, but the device complexity increases

Engineering Contradiction:

Improvecenter alignment precisionVSAvoidchuck body structure

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The chuck body is designed with a conical shape featuring guide portions that are curved surfaces. This conical geometry with guide portions provides a self-aligning effect, guiding the support members to the correct positions and ensuring proper alignment between the chuck center and paper roll center. The curved guide portions simplify the alignment process while maintaining precision.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The conical chuck body with asymmetric guide portions creates an asymmetric structure that naturally compensates for misalignment. The asymmetric geometry of the guide portions allows the support members to be positioned at different locations along the conical surface, enabling the system to handle center deviations between the chuck and paper roll effectively.

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS20250340393A1Paper roll support device, paper roll chuck, and device for manufacturing cardboard sheet

Publication Date: 2025.11.06 MITSUBISHI HEAVY IND MACHINERY SYST LTD

AI summary

A support device includes: two support arms movably supported along an axial direction; a driver causing the support arms to approach and separate; and two chucks rotatably mounted on tip portions of the support arms for supporting a paper roll. The chucks include: a main body having an outer diameter decreasing toward a tip portion, and guide parts along the axial direction provided on an outer circumference; and a support members including a receiving part movably supported by the guide parts and for contacting an end of the paper roll, and a support part for contacting an inner circumference of the paper roll. A movement unit includes a movement member for contacting the support members and moves the support members to the tip portion side by the movement member. A force applying device applies force in such a direction that the support members and the movement member approach each other.