Hanger Bar Notch With Bendable Tab For Grid Runner Retention
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Solution Overview
Problem
Existing grid runner hangers require manual reconfiguration and restoration at installation sites, leading to increased installation time and instability of grid runners during installation, as notches fail to securely hold the reinforcing bulb, causing it to slip out.
Innovation Solution
A malleable sheet metal hanger with a specially formed notch and bendable tab that securely captures the reinforcing bulb, allowing easy insertion and preventing accidental release, featuring a precision-bent tab to ensure consistent bulb retention and a notch profile accommodating field-cut runners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual reconfiguration of the notch is performed to receive the bulb, then the bulb can be inserted into the notch, but installation time increases and the bulb may slip out during installation
Solution Approach 1:
The notch is pre-formed during manufacturing with the bulb-receiving geometry already prepared, eliminating the need for现场 manual reconfiguration. The bendable tab is pre-positioned to automatically engage the bulb as it is inserted, providing immediate retention without requiring installer intervention to bend or adjust components.
Solution Approach 2:
The bendable tab automatically engages the bulb through its own elasticity and geometry as the bulb is inserted into the notch. The tab's movement and locking action occur automatically during the insertion process itself, without requiring separate manual operations by the installer to secure the bulb.
2Adaptability or versatility
If the notch is opened to allow bulb insertion, then the bulb can be received, but the bulb becomes unstable and may slip out when attempting to install additional runners
Solution Approach 1:
The bendable tab provides dynamic retention where the retention force automatically adjusts as the bulb is inserted and seated. The tab bends to accommodate the bulb's entry, then springs back to engage and lock the bulb in place, providing adaptive retention that responds to the installation process itself rather than requiring a fixed, pre-configured notch geometry.
Solution Approach 2:
The physical state of the notch transitions from an open, non-retentive state to a closed, retentive state through the mechanical action of the bendable tab. The tab changes the notch's geometry dynamically during insertion, creating a secure engagement configuration only when the bulb is properly seated, thereby providing conditional stability based on installation progress.
3Reliability
If the tab is bent back into the plane of the hanger to lock the bulb, then the bulb is securely retained, but the process requires additional manual steps
Solution Approach 1:
The bendable tab's elastic properties enable it to automatically engage and lock the bulb through its own mechanical movement during insertion. The tab bends as the bulb enters and springs back to secure the bulb in place, performing the retention function automatically without requiring the installer to execute separate bending or locking actions.
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 solution significantly reduces installation time and enhances the stability of grid runners by ensuring secure retention of the bulb, preventing slippage during installation and bumps, while allowing easy passage of field-cut runners and facilitating efficient ceiling construction.
Implementation Method 1
A bendable tab constituting a portion of the notch profile is bent out of the plane of the hanger to allow lateral passage of the bulb into the notch space. Once received in the notch space, the tab is bent back into the plane of the hanger at the notch area to lock the bulb in the notch.
Implementation Method 2
The disclosed hanger, formed of malleable sheet metal, receives the hollow reinforcing bulb of a conventional grid runner or tee.
Data Source
Figure 1
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AI summary
A runner hanger comprising a metal strip having a plurality of spaced upper holes, a lower portion including a lower edge interrupted by a series of regularly spaced notches, the notches being configured to receive a hollow reinforcing bulb of a grid runner extending transversely to the hanger, the notch having a pair of longitudinally spaced ledges configured to support the bottom sides of a reinforcing bulb, the notches having a bendable tab carrying one of the ledges, the tabs being precision machine bent at an angle relative to a plane of the lower portion that allows a grid runner reinforcing bulb to be inserted when tilted in the associated notch and prevents the bulb from falling out of the notch when the runner is upright.