Stitching Apparatus Vertical Adaptation for Variable Thickness

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing gathering and stitching machines face challenges in adapting to varying product thicknesses, leading to disruptions, faults, and increased wear due to the need for complex and fault-prone vertical adjustments of transport chains.

Innovation Solution

A stitching apparatus with vertically adjustable stitching heads and clinch boxes, where the horizontal position of signatures remains constant, and the stitching heads are displaced based on product thickness using a coupled swinging arm mechanism, allowing for smooth operation and reduced fault susceptibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the height of gathering chains is adjusted to adapt to varying product thickness, then the adaptability to different product specifications is improved, but the complexity of the adjustment mechanism increases and reliability decreases

Engineering Contradiction:

Improveadaptability to product thicknessVSAvoidoperational reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

Instead of adjusting the gathering chains vertically to adapt to different product thicknesses, the patent inverts the approach by keeping the chains at a fixed horizontal position and allowing the stitching heads and clinch boxes to move vertically. This inversion eliminates the need for complex chain height adjustment mechanisms, reducing fault susceptibility while maintaining adaptability to varying product specifications.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent divides the adjustment function into separate components: the gathering chains remain fixed in position, while the stitching heads and clinch boxes are independently adjustable vertically. This segmentation allows each component to perform its specific function without interference, simplifying the overall system and improving reliability.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If vertical adjustment mechanisms are added to adapt to varying product thickness, then adaptability is improved, but device complexity increases

Engineering Contradiction:

Improveadaptability to product thicknessVSAvoidcomplexity of adjustment mechanism

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies inversion by reversing which components are adjustable. Rather than making the gathering chains vertically adjustable (which would increase complexity), the stitching heads and clinch boxes are made adjustable while the chains remain fixed. This reduces mechanical complexity while achieving the same adaptability goal.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent introduces dynamic adjustability specifically where needed - the stitching heads and clinch boxes can move vertically to accommodate different product thicknesses, while the gathering chains maintain a static, simple configuration. This selective dynamics approach minimizes overall system complexity.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If the horizontal position of signatures is changed for vertical adaptation, then adaptability is improved, but transport smoothness deteriorates

Engineering Contradiction:

Improveadaptability to product thicknessVSAvoidtransport smoothness

Core Design Contradiction:

Adaptability or versatilityVSSpeed

Solution Approach 1:

The patent inverts the adaptation approach by maintaining constant horizontal positioning of signatures during transport while enabling vertical adjustment of the stitching apparatus. This ensures smooth, uninterrupted horizontal transport at high speeds while still providing the necessary adaptability through vertical movement of stitching components.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent resolves the conflict by moving the adjustment from the horizontal dimension (which would disrupt transport) to the vertical dimension. The stitching heads and clinch boxes adjust in the vertical direction to accommodate different product thicknesses, while the horizontal transport of signatures remains undisturbed and smooth.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS7637489B2Stitching apparatus and gathering and stitching machine having the stitching apparatus

Publication Date: 2009.12.29 MULLER MARTINI HLDG

AI summary

A stitching apparatus for manufacturing printed products, in particular in a gathering and stitching machine, includes a stitching carriage, at least one stitching head for shaping and driving a staple into a stack of signatures, and at least one clinch box for closing the staple driven through the signatures. An actuating device vertically displaces the stitching head for adaptation of the stitching apparatus to a thickness of the stack of signatures. A gathering and stitching machine having a stitching apparatus is also provided.