Ring Threading Jig for Accurate Soft Ring Notebook Insertion

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Solution Overview

Problem

Existing ring notebook manufacturing processes face challenges in accurately inserting ring bodies made of soft materials like resin or paper into binding holes due to misregistration, leading to difficulties in penetration.

Innovation Solution

A ring threading device equipped with a positioning jig and a moving mechanism that maintains the pitch of ring bodies and moves them relative to the placement table, ensuring accurate insertion into binding holes, even for soft materials.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the ring is moved up or down to insert ring bodies into binding holes, then the ring bodies can be inserted into the binding holes, but misregistration occurs between the ring bodies and the binding holes due to the soft material nature

Engineering Contradiction:

Improveinsertion accuracy of ring bodies into binding holesVSAvoidregistration accuracy between ring bodies and binding holes

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

The positioning jig is used to preliminarily position the ring bodies at predetermined locations before the insertion process. This preliminary positioning action ensures that the ring bodies are accurately aligned with the binding holes before the actual insertion occurs, preventing misregistration that would otherwise happen when moving the ring up or down.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The positioning jig acts as an intermediary device between the ring bodies and the binding holes. It provides a stable reference framework that maintains the correct spatial relationship between the ring bodies and binding holes during the insertion process, eliminating the need to move the entire ring up or down and thus preventing misregistration.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If the ring bodies are positioned and inserted while maintaining their positioned state, then accurate insertion is achieved, but the device complexity increases due to the positioning jig

Engineering Contradiction:

Improveinsertion accuracy of ring bodies into binding holesVSAvoidstructure complexity of the threading device

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The positioning jig is segmented into multiple independent positioning parts, each corresponding to a specific ring body. This segmentation allows each positioning part to independently hold and position its corresponding ring body, simplifying the overall device structure while maintaining high positioning accuracy. The modular design reduces complexity compared to a monolithic positioning system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The positioning jig is designed to automatically maintain the positions of the ring bodies without requiring external adjustment or complex control mechanisms. The jig structure itself provides the positioning function, and once positioned, the ring bodies remain stable in their locations during the insertion process, eliminating the need for additional active control systems.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20260014812A1Ring threading device and method for manufacturing ring notebook

Publication Date: 2026.01.15 KOKUYO CO LTD

AI summary

To allow ring bodies of a ring made of resin or paper to be accurately inserted and to penetrate binding holes of sheets when manufacturing a ring notebook, a ring threading device includes a placement table on which sheets are placed, a positioning jig having a guide roller and nip rollers, and a ring moving mechanism. The positioning jig is a jig for holding a plurality of the ring bodies while maintaining intervals between the ring bodies. The ring moving mechanism is a mechanism for allowing the ring bodies held by the positioning jig to penetrate the binding holes.