Hollow Board Rivet Mounting Surface Recess Reduction
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Solution Overview
Problem
The attachment of a mounting member to a hollow board made of resin using a blind rivet results in a recessed portion on the surface, deteriorating the appearance of the board due to the inward pulling of the surface member as the rivet sections break through the vertical wall portions.
Innovation Solution
A hollow laminated board design with a tabular first and second plate-like member and a middle member forming a hollow portion, where the blind rivet's sleeve sections break through the vertical wall portions between the first and center portions of the middle member, reducing the inward pulling of the second plate-like member and minimizing surface recess formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the blind rivet is used to attach a mounting member to a hollow board, then the mounting member can be securely fastened, but a recessed portion is formed in the surface of the hollow board deteriorating its appearance
Solution Approach 1:
The hollow board is segmented into a first plate-like member and a second plate-like member connected by vertical wall portions, creating a structured framework that distributes the rivet's expansion forces and prevents surface recess formation
Solution Approach 2:
The vertical wall portions are strategically positioned to provide localized structural support at critical areas where the blind rivet sections break through, preventing the inward pulling that causes surface recesses while maintaining overall board integrity
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
This design minimizes the appearance deterioration by reducing the depth of the recessed portion formed on the surface of the hollow board, enhancing its aesthetic appeal while maintaining secure attachment of the mounting member.
Implementation Method 1
Pulling the mandrel in this state to the shaft portion side causes the head portion to tear the sleeve of the rivet main body into sections and these sections to spread outward in the radial direction like petals
Implementation Method 2
During the spreading, tips of the sections break through the vertical wall portions of the middle member at positions between the first plate-like member and center portions of the vertical wall portions in the thickness direction, and are fastened to the hollow laminated board
Data Source
AI summary
Tips of sections in a spreading state come into contact with vertical wall portions of a middle member at positions between a first plate-like member and center portions of the vertical wall portions in the thickness direction. Then, the sections break through the vertical wall portions, and are fastened to a hollow laminated board. Thus, a mounting bracket is attached to the hollow laminated board. This makes it possible to obtain a deck board with a small recessed portion formed in a top face.