Split-Tongue Connector Grooves for Fast Flooring Assembly
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Solution Overview
Problem
Existing connector systems for joining building panels and furniture are inefficient due to geometric sensitivity to manufacturing tolerances and require specialized cutting tools, limiting high-speed production in commercial flooring applications.
Innovation Solution
A connector system featuring lateral and normal split-tongue connectors with flexible arms and mating grooves designed for high-speed fabrication using circular saw cuts, allowing for economical production and easy removal of damaged boards without damaging the connector or adjacent components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If steps are formed in the mating groove using rotary router or linear broach cutters to enable forced drawing of the connector into the groove, then the connector can be mechanically locked, but the manufacturing speed decreases and heating/chip removal issues arise
Solution Approach 1:
The patent changes the geometric parameters of the mating groove, specifically eliminating the stepped configuration and using smooth curved surfaces with controlled radii. This allows the groove to be formed by high-speed circular saw cutting rather than requiring rotary routers or linear broaches, thereby achieving both reliable mechanical locking and high manufacturing speed consistent with commercial flooring production
Solution Approach 2:
The patent replaces the traditional rotary router or linear broach cutting system with a circular saw cutting system. This substitution enables high-speed groove fabrication by using a different mechanical approach that avoids the heating and chip removal limitations of the original system while maintaining the ability to form precise groove geometries
2Reliability
If the mating groove geometry is designed with steps to interact with catches on the connector, then the connector can be forcibly drawn into the groove, but the system becomes more sensitive to geometric deviations from manufacturing tolerances
Solution Approach 1:
The patent modifies the groove geometry parameters by replacing sharp steps with smooth transitions defined by controlled radii (e.g., radius R1 at the apex, radius R2 in the hold region). This parameter change reduces sensitivity to manufacturing tolerances while maintaining the ability to generate sufficient drawing force through the interaction between the connector's flexible arms and the groove's curved surfaces
Solution Approach 2:
The patent incorporates a hold region with diverging sidewalls and a specific radius of curvature that acts as a cushioning zone. This region allows the connector's flexible arms to gradually engage and be drawn into the groove without requiring precise geometric alignment, thereby compensating for potential manufacturing variations before final locking occurs
3Strength
If a solid tongue is machined from the substrate material to join flooring elements, then structural strength is achieved, but saleable decorative surface is lost
Solution Approach 1:
The patent divides the tongue structure into separate components: a base plate and flexible arms that can be attached to the substrate edges rather than machining a solid tongue from the entire substrate thickness. This segmentation allows the decorative surface to remain intact on the flooring panels while still providing the necessary structural connection through the separate connector elements
Solution Approach 2:
The patent extracts the connector function from the substrate material itself by using separate base plates and flexible arms that attach to the substrate edges. This extraction eliminates the need to remove decorative surface material to create a tongue, as the connecting elements are applied to rather than machined from the substrate
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
Enables efficient, cost-effective mechanical joining of construction elements with improved manufacturing speed and ease of board replacement, suitable for both flooring and furniture applications.
Implementation Method 1
a connector system featuring lateral and normal split-tongue connectors with flexible arms and mating grooves
Data Source
AI summary
A connector system for mechanically connecting two structural elements to each other, consisting of a connector element and mating grooves in each structural element. The connector element is comprised of a base plate having a split-tongue element at each side or end of said base plate. Each joined element has a mating groove formed into its connector-receiving surface. The mating groove is designed to allow fabrication via four sequential circular saw cuts, without loss of saleable decorative surface, and at a rate consistent with economical commercial production of vinyl, laminate, or hardwood flooring. The connector element is readily extruded in a variety of polymers, including PVC. The connector and mating grooves interact so as to generate a force component acting to forcibly draw the connector into the mating grooves. The connector system operation is relatively insensitive to geometric deviations associated with normal manufacturing methods.