Lid Forming Device Mountain Shape Flap Insertion
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Solution Overview
Problem
Cardboard box flaps used in lid forming devices often lose strength and hardness upon reuse, leading to buckling issues when bent and inserted into slits, making it difficult to form a secure lid.
Innovation Solution
A lid forming device with a first and second folding mechanism, utilizing suction retaining units to bend and extend the second flap, allowing its distal end to be inserted into the slit of the first flap without applying unnecessary load, thereby preventing buckling and ensuring easy insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second flap is bent and the bent portion is pushed in to insert into slits, then the lid can be formed, but the distal end of the second flap will buckle and fail to insert properly when the flap has lost its initial hardness and strength through reuse
Solution Approach 1:
The patent applies preliminary action by first forming a mountain shape in the second flap before insertion, creating a pre-formed structure that guides the insertion process. The distal end is positioned along the upper surface of the first flap before being pushed in, ensuring proper alignment and reducing buckling risk even when flap strength is reduced through reuse
Solution Approach 2:
The patent segments the flap manipulation process into distinct stages: first forming the mountain shape, then positioning the distal end along the upper surface, and finally pushing the bent portion into the slit. This segmentation allows each stage to be optimized independently, improving insertion reliability for reused flaps with reduced strength
2Manufacturing precision
If the distal end of the second flap is pushed in forcefully to ensure insertion, then insertion can be achieved, but unnecessary load is applied causing buckling and deformation
Solution Approach 1:
The mountain shape is formed in advance and the distal end is positioned along the upper surface before insertion, creating a pre-aligned configuration that guides the flap into the slit with minimal force, preventing buckling while ensuring precise insertion
Solution Approach 2:
The patent provides a guided path by positioning the distal end along the upper surface of the first flap before insertion. This pre-positioning acts as a cushioning guide that distributes the insertion force evenly, preventing sudden buckling and deformation during the insertion process
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 device ensures the distal end of the second flap is smoothly inserted into the slit of the first flap without deformation, maintaining the structural integrity of the flaps and enhancing the lid forming process, even in reused cardboard boxes.
Implementation Method 1
The first retaining unit retains by suck holding a first face between a free end of the second flap and a bend line set beforehand in the second flap. The second retaining unit retains by suck holding a second face between an anchored end of the second flap and the bend line.
Data Source
Figure 1
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AI summary
A lid forming device of a cardboard box using a first flap with a slit and a second flap to be extended after being bent into a mountain shape is disclosed. The lid forming device includes first and second folding mechanisms. The fist folding mechanism folds the first flap in a direction of closing the opening. The second folding mechanism bends the second flap into a mountain shape and inserts part of the second flap into the slit of the first flap while extending the second flap. The second folding mechanism includes first and second retaining units. The first retaining unit retains a first face of the second flap located between a free end of the second flap and a bend line set beforehand in the second flap. The second retaining unit retains a second face of the second flap located between an anchored end and the bend line.