Bagworm Silk Collection Device Using Segmented Container Geometry

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Solution Overview

Problem

Existing methods struggle to efficiently collect pure bagworm silk threads without contaminants, as leaves and twigs adhere to the threads, requiring significant labor and increasing production costs.

Innovation Solution

A thread collecting device with a container of specific dimensions and a discharge hole allows bagworms to spin silk threads inside, forming a pure silk thread mass that can be easily collected without contaminants.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional methods are used to collect bagworm silk threads, then silk threads can be obtained, but leaves and twigs adhere to the threads requiring significant labor for cleaning

Engineering Contradiction:
Improvesilk thread collection efficiencyVSAvoidcleaning process complexity
Core Design Contradiction:
ProductivityVSEase of manufacture

Solution Approach 1:

The invention separates the silk thread collection process from the nest structure by providing individual containers for each bagworm. This segmentation prevents cross-contamination between multiple worms and allows the silk threads to be collected in isolation, forming clean thread masses without adhering nest materials.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The container acts as an intermediary structure between the bagworm and the collection environment. By providing this controlled intermediate space with specific dimensional ratios, the invention enables silk threads to be deposited cleanly without direct contact with external contaminants like leaves and twigs.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Quantity of substance

If traditional collection methods are used, then silk threads can be gathered, but the production cost increases due to labor-intensive cleaning

Engineering Contradiction:
Improvesilk thread yieldVSAvoidproduction cost
Core Design Contradiction:
Quantity of substanceVSEase of manufacture

Solution Approach 1:

The bagworm naturally produces silk threads that accumulate within the container boundaries. The system leverages the worm's innate behavior to automatically form clean silk thread masses without requiring external cleaning intervention. The container geometry itself facilitates the self-organization of silk into collectible forms.

Inventive Principle:
Principle #25Self-service

3Adaptability or versatility

If bagworms are reared in traditional environments, then they can produce silk threads, but leaves and twigs from their nests contaminate the threads

Engineering Contradiction:
Improvebagworm rearing flexibilityVSAvoidcontaminant adherence
Core Design Contradiction:
Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The invention applies different functional qualities to different parts of the collection system. The container provides a controlled local environment with specific dimensional characteristics that prevent contaminant adherence, while still allowing the bagworm to exhibit its natural silk-producing behavior. The local geometry of the container creates optimal conditions for clean silk deposition.

Inventive Principle:
Principle #3Local quality

Data Source

PatentEP3670711B1Thread collection device
Publication Date: 2025.12.10 NATIONAL AGRICULTURE & FOOD RESEARCHORGANIZATION
  • EP3670711B1 patent drawingFigure 1A~1C
  • EP3670711B1 patent drawingFigure 2A~2D
  • EP3670711B1 patent drawingFigure 3A~3C

AI summary

A thread collecting method for easily and simply collecting a bagworm-derived pure silk thread from a bagworm with a small number of processes and a thread collecting device for implementing the thread collecting method are developed and provided. A device that collects a silk thread from a bagworm is provided, the device including: a container that accommodates the bagworm; and an in-and-out hole through which the bagworm is put in and taken out of the container. A width of a maximum short axis cross section of an inner space of the container is in a range from 1.2 times or more to less than 3.1 times relative to a maximum body width of the bagworm being accommodated.